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Papers by Alexandra Jablonka

IntroductionMigrant healthcare workers played an important role during the COVID-19 pandemic, but... more IntroductionMigrant healthcare workers played an important role during the COVID-19 pandemic, but data are lacking especially for high-resourced European healthcare systems. This study aims to research migrant healthcare workers through an intersectional health system-related approach, using Germany as a case study.MethodsAn intersectional research framework was created and a rapid scoping study performed. Secondary analysis of selected items taken from two COVID-19 surveys was undertaken to compare perceptions of national and foreign-born healthcare workers, using descriptive statistics.ResultsAvailable research is focused on worst-case pandemic scenarios of Brazil and the United Kingdom, highlighting racialised discrimination and higher risks of migrant healthcare workers. The German data did not reveal significant differences between national-born and foreign-born healthcare workers for items related to health status including SARS-CoV-2 infection and vaccination, and perception ...

Frontiers in Psychiatry

IntroductionThe coronavirus disease 2019 (COVID-19) pandemic impacted how people perform their da... more IntroductionThe coronavirus disease 2019 (COVID-19) pandemic impacted how people perform their daily lives in manifold and sometimes massive ways. Particularly, individuals who are at high risk for a severe disease progression, like immunocompromised people, may have experienced drastic changes in social participation during the pandemic. A COVID-19 basic vaccination may have changed the safety behavior of immunocompromised individuals in terms of infection risk and thereby influence social participation and mental wellbeing.MethodsThis study aims to investigate self-perceived social participation at baseline before and at follow-up 1 and 6 months after basic vaccination. Beginning in March 2021, 274 immunocompromised persons 18 years or older were enrolled in the COVID-19 Contact Immune study (CoCo study) in Lower Saxony, Germany. Measurements were performed at three time points regarding social participation [Index for the Assessment of Health Impairments (IMET)], mental health [P...

Zeitschrift für Rheumatologie

Frontiers in Medicine

Background: Sicca syndrome represents a heterogeneous group of conditions, such as Sjögren syndro... more Background: Sicca syndrome represents a heterogeneous group of conditions, such as Sjögren syndrome, causing xerophthalmiaand xerostomia. This study characterizes in depth patients with Sicca syndrome and evaluates salivary gland ultrasound (SGUS).Methods: Principal component analysis and hierarchical clustering of clinical parameters, such as ESSPRI, ESSDAI and laboratory data, were performed on all referrals for assessment of Sicca symptoms between October 2018 and March 2021. SGUS and labial gland biopsies were compared across groups.Results: A total of 583 patients were assessed. Objective dryness was confirmed in 73% of the patients. Cluster analysis identified 3 groups with post-hoc analysis confirming distinct phenotypes: Somatic Group (283/583; 49%) with more frequent symptoms but limited objective dryness; Dry Without Autoimmune Features (DAFneg, 206/584; 35%), and Dry With Autoimmune Features (DAFpos, 94/584;16%). DAFpos patients had highest autoantibody titers (anti-SSA(R...

Background Haemodialysis patients are at-risk for severe COVID-19 and were among the first to rec... more Background Haemodialysis patients are at-risk for severe COVID-19 and were among the first to receive a fourth COVID-19 vaccination. Methods We analysed humoral responses by multiplex-based IgG measurements against the receptor-binding domain (RBD) and ACE2-binding inhibition towards variants of concern including Omicron in haemodialysis patients and controls after triple BNT162b2 vaccination and in dialysis patients after a fourth full-dose of mRNA-1273. T-cell responses were assessed by interferon gamma release assay. Findings After triple BNT162b2 vaccination, anti-RBD B.1 IgG and ACE2 binding inhibition reached peak levels in dialysis patients, but remained inferior compared to controls. Whilst we detected B.1-specific ACE2 binding inhibition in 84% of dialysis patients after three BNT162b2 doses, binding inhibition towards the Omicron variant was only 38% and declining to 16% before the fourth vaccination. By using mRNA-1273 as fourth dose, humoral immunity against all SARS-CoV...

Frontiers in Public Health

Immunocompromised persons are at an increased risk for a severe SARS-CoV-2 infection and their sa... more Immunocompromised persons are at an increased risk for a severe SARS-CoV-2 infection and their safety behaviors may influence their social participation. Vaccinated persons have a lower incidence of infection and severe disease when infected compared to non-vaccinated persons. Therefore, their behavior may change and their social participation may increase after a complete vaccination. The aim of this study was to explore social participation of immunocompromised persons before and after complete COVID-19 vaccination. Between March and September 2021, 274 immunocompromised participants were recruited. Survey data were collected at baseline and follow-up from 194 participants including the Index for the Assessment of Health Impairments [IMET], Patient Health Questionnaire-4 [PHQ-4], subjective health status and quality of life. At baseline, participants were not yet completely vaccinated. Complete vaccination was achieved prior to the follow-up questionnaire. IMET scores decreased si...

Annals of the Rheumatic Diseases

BackgroundSicca syndrome represents a heterogeneous group of conditions, including Sjögren syndro... more BackgroundSicca syndrome represents a heterogeneous group of conditions, including Sjögren syndrome, causing xerophthalmia and xerostomia.ObjectivesThis study characterizes in depth patients with Sicca syndrome and evaluates salivary gland ultrasound (SGUS) in this cohort.MethodsPrincipal component analysis and hierarchical clustering of clinical parameters, including ESSPRI, ESSDAI and laboratory data were performed on all referrals for assessment of Sicca symptoms between October 2018 and March 2021. SGUS and labial gland biopsies were compared across groups.Results583 patients were assessed. Objective dryness was confirmed in 73% of patients. Cluster analysis identified 3 groups with post-hoc analysis confirming distinct phenotypes: Somatic Group (283/583; 49%) with higher reported symptoms but limited objective dryness; Dry Without Autoimmune Features (DAFneg, 206/532; 35%) and Dry With Autoimmune Features (DAFpos, 94/532; 16%). DAFpos patients had highest autoantibody titres (S...

European Journal of Medical Research

Background The influence of immunosuppressive therapy on immunogenicity after COVID-19 vaccinatio... more Background The influence of immunosuppressive therapy on immunogenicity after COVID-19 vaccination remains unclear. This study surveys patients who receive immunosuppressive therapy about whether or not they paused their immunosuppressive medication while receiving SARS-CoV-2 vaccination. Methods In this prospective observational study, immunosuppressed participants were asked by phone and email about their medication before and during vaccination and who—if anyone—advised them to pause their medication. In addition, a baseline paper-based questionnaire contributes general characteristics regarding age, gender, immunosuppressive medication(s) and the chronic disease(s) requiring immunosuppressive therapy. Results Of 207 surveyed participants, 59 persons (28.5%) paused their immunosuppressive medication before/during vaccination. Persons with rheumatic conditions and women were significantly more likely to pause immunosuppressive therapy than others. Over half of those who paused the...

Somatoform symptoms. (DOCX 13 kb)

Pathogens, 2022

Background: Infections, as well as adverse birth outcomes, may be more frequent in migrant women.... more Background: Infections, as well as adverse birth outcomes, may be more frequent in migrant women. Schistosomiasis, echinococcosis, and hepatitis E virus (HEV) seropositivity are associated with the adverse pregnancy outcomes of fetal growth restriction and premature delivery. Methods: A cohort study of 82 pregnant women with a history of migration and corresponding delivery of newborns in Germany was conducted. Results: Overall, 9% of sera tested positive for anti-HEV IgG. None of the patients tested positive for anti-HEV IgM, schistosomiasis, or echinococcus serology. Birth weights were below the 10th percentile for gestational age in 8.5% of the neonates. No association between HEV serology and fetal growth restriction (FGR) frequency was found. Conclusions: In comparison to German baseline data, no increased risk for HEV exposure or serological signs of exposure against schistosomiasis or echinococcosis could be observed in pregnant migrants. An influence of the anti-HEV serology...

Reports suggest that COVID-19 vaccine effectiveness is decreasing, either due to waning immune pr... more Reports suggest that COVID-19 vaccine effectiveness is decreasing, either due to waning immune protection, emergence of new variants of concern, or both. Heterologous prime/boost vaccination with a vector-based approach (ChAdOx-1nCov-19, ChAd) followed by an mRNA vaccine (e.g. BNT162b2, BNT) appeared to be superior in inducing protective immunity, and large scale second booster vaccination is ongoing. However, data comparing declining immunity after homologous and heterologous vaccination as well as effects of a third vaccine application after heterologous ChAd/BNT vaccination are lacking. We longitudinally monitored immunity in ChAd/ChAd (n=41) and ChAd/BNT (n=88) vaccinated individuals and assessed the impact of a second booster with BNT in both groups. The second booster greatly augmented waning anti-spike IgG but only moderately increased spike-specific CD4+ and CD8+ T cells in both groups to cell frequencies already present after the boost. More importantly, the second booster ...

European Journal of Public Health, 2020

Background The importance of a sustainable health workforce is increasingly recognised. However, ... more Background The importance of a sustainable health workforce is increasingly recognised. However, the specialised heath workforce remains marginal in health workforce planning, policy and research. This paper aims to improve the integration of small specialised professional groups in health workforce governance and to critically assess existing tools, using Germany and rheumatology physicians as a case study. Methods A qualitative explorative approach was applied, which draws on a scoping review of the literature, public statistics and expert information. The National Health Workforce Accounts (NHWA) and the WHO 'AAAQ' framework served as guidance to assess workforce development in rheumatology in Germany. Results On average physician density is high in Germany, yet access to specialised care may be seriously delayed and services may not be accessible to all patients; e.g. currently only half of the patients with spondyloarthritis are treated by a rheumatologist which impacts...

Zeitschrift für Rheumatologie, 2021

Zusammenfassung Hintergrund In der ambulanten Versorgung wurde Telemedizin im Lockdown von März b... more Zusammenfassung Hintergrund In der ambulanten Versorgung wurde Telemedizin im Lockdown von März bis Mai 2020 eingesetzt. Ziel der Studie war es, Patienten aus einer Praxis und der Hochschulambulanz bezüglich Patientenzufriedenheit mit Telemedizin, COVID-19-Sorgen und Impfverhalten auszuwerten sowie die Gesprächsführung durch eine rheumatologische Fachassistenz (RFA) mit einem Arzt zu vergleichen. Methoden Patienten mit rheumatoider Arthritis, Psoriasisarthritis oder Spondyloarthritis ohne Therapieänderung seit der letzten Vorstellung wurde ein telemedizinischer Ersatztermin im Rahmen dieser Studie bei Terminabsage durch die versorgenden Zentren angeboten. Randomisiert wurden sie von einem Arzt oder einer RFA (RFA nur Universität) telemedizinisch versorgt. Die Anamnese erfolgte telefonisch standardisiert mittels Fragebogen. Die Krankheitsaktivität wurde mittels modifizierten Clinical Disease Activity Score (CDAI) und BASDAI festgestellt. Im Anschluss erhielten die Patienten einen pse...

Im Jahr 2016 wurden in Deutschland mehr als 700 000 Asylerstantrage gestellt. Das haufigste Herku... more Im Jahr 2016 wurden in Deutschland mehr als 700 000 Asylerstantrage gestellt. Das haufigste Herkunftsland war Syrien. Der Anteil weiblicher Migranten lag in verschiedenen Betrachtungen zwischen 20 und 35 %. Mit schwangeren Migrantinnen muss in 3,5 % gerechnet werden. In dieser vulnerablen Patientengruppe sollte gezielt nach Risikofaktoren fur einen ungunstigen Verlauf der Schwangerschaft gesucht werden. Im Hinblick auf das infektiologische, tropenmedizinische Erregerspektrum sind dies vor allem die Tuberkulose und parasitare Erkrankungen. Bei Afrikanern sind Bilharziose und Malaria von hoher Relevanz. Bei Lateinamerikanern steht die Chagas-Erkrankung im Vordergrund. Aktuelle Studien zum Erkrankungsspektrum von Migrantinnen, die ein Kind erwarten, stehen bisher nicht zur Verfugung.

Journal of Clinical Medicine, 2020

The phenotype of primary immunodeficiency disorders (PID), and especially common variable immunod... more The phenotype of primary immunodeficiency disorders (PID), and especially common variable immunodeficiency (CVID), may be dominated by symptoms of autoimmune disorders. Furthermore, autoimmunity may be the first manifestation of PID, frequently preceding infections and the diagnosis of hypogammaglobulinemia, which occurs later on. In this case, distinguishing PID from hypogammaglobulinemia secondary to anti-inflammatory treatment of autoimmunity may become challenging. The aim of this study was to evaluate the diagnostic accuracy of peripheral blood lymphocyte phenotyping in resolving the diagnostic dilemma between primary and secondary hypogammaglobulinemia. Comparison of B and T cell subsets from patients with PID and patients with rheumatic disease, who developed hypogammaglobulinemia as a consequence of anti-inflammatory regimes, revealed significant differences in proportion of naïve B cells, class-switched memory B cells and CD21low B cells among B cells as well as in CD4+ mem...

Cellular & Molecular Immunology, 2021

Patients undergoing chronic hemodialysis were among the first to receive SARS-CoV-2 vaccinations ... more Patients undergoing chronic hemodialysis were among the first to receive SARS-CoV-2 vaccinations due to their increased risk for severe COVID-19 disease and high case fatality rates. To date, there have been minimal longitudinal studies in hemodialysis patients to ascertain whether protection offered by vaccination is long-lasting. To assess how surrogates for protection changed over time, we examined both the humoral and cellular response in a previously reported cohort of at-risk hemodialysis patients and healthy donors, four months after their second dose of Pfizer BNT162b2. Compared to three weeks post-second vaccination, both cellular and humoral responses against the original SARS-CoV-2 isolate as well as variants of concern were significantly reduced, with some dialyzed individuals having no B- or T-cell response. Our data strongly support the need for a third booster in hemodialysis patients and potentially other at-risk individuals.

Zeitschrift für Rheumatologie, 2021

Zusammenfassung Hintergrund und Fragestellung Fachkräftemangel in der Rheumatologie in Deutschlan... more Zusammenfassung Hintergrund und Fragestellung Fachkräftemangel in der Rheumatologie in Deutschland ist als Versorgungsproblem erkannt. Die Gesundheitspolitik hat mit neuen Planungszielen reagiert, aber es fehlen effektive Interventionsstrategien. Ziel dieser Studie ist ein systematischer berufsstruktureller Überblick, um die Grundlage für Interventionen zu verbessern und Möglichkeiten für ein effektives Fachkräftemanagement aufzuzeigen. Methode Die WHO National Health Workforce Accounts (NHWA) dienen als konzeptioneller Rahmen. Ausgewählt werden 4 Indikatoren: Personalbestand, Arbeitsmarktbewegungen, Komposition und Weiterbildung. Die Exploration von Entwicklungstrends stützt sich auf vergleichende Analysen von Altersgruppen und Zeitreihen. Die Erhebung nutzt öffentliche Statistiken und andere Sekundärliteratur; die Auswertung erfolgt deskriptiv. Ergebnisse In Deutschland sind 1076 Ärzt*innen mit einer Facharztqualifikation oder Schwerpunktbezeichnung in der internistischen Rheumato...

BackgroundPatients with chronic renal insufficiency on intermittent hemodialysis face an increase... more BackgroundPatients with chronic renal insufficiency on intermittent hemodialysis face an increased risk of COVID-19 induced mortality and impaired vaccine responses. To date, only few studies addressed SARS-CoV-2 vaccine elicited immunity in this immunocompromised population.MethodsWe assessed immunogenicity of the mRNA vaccine BNT162b2 in at risk dialysis patients and characterized systemic cellular and humoral immune responses in serum and saliva using interferon γ release assay and multiplex-based cytokine and immunoglobulin measurements. We further compared binding capacity and neutralization efficacy of vaccination-induced immunoglobulins against emerging SARS-CoV-2 variants of concern B.1.1.7, B.1.351, B.1.429 and Cluster 5 by ACE2-RBD competition assay.FindingsPatients on intermittent hemodialysis exhibit detectable but variable cellular and humoral immune responses against SARS-CoV-2 and variants of concern after a two-dose regimen of BNT162b2. Although vaccination-induced i...

Clinical Infectious Diseases, 2021

Background Vaccine-induced neutralizing antibodies are key in combating the coronavirus disease 2... more Background Vaccine-induced neutralizing antibodies are key in combating the coronavirus disease 2019 (COVID-19) pandemic. However, delays of boost immunization due to limited availability of vaccines may leave individuals vulnerable to infection and prolonged or severe disease courses. The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOC)—B.1.1.7 (United Kingdom), B.1.351 (South Africa), and P.1 (Brazil)—may exacerbate this issue, as the latter two are able to evade control by antibodies. Methods We assessed humoral and T-cell responses against SARS-CoV-2 wild-type (WT), VOC, and endemic human coronaviruses (hCoVs) that were induced after single and double vaccination with BNT162b2. Results Despite readily detectable immunoglobulin G (IgG) against the receptor-binding domain of the SARS-CoV-2 S protein at day 14 after a single vaccination, inhibition of SARS-CoV-2 S-driven host cell entry was weak and particularly low for the B.1.351...

IntroductionMigrant healthcare workers played an important role during the COVID-19 pandemic, but... more IntroductionMigrant healthcare workers played an important role during the COVID-19 pandemic, but data are lacking especially for high-resourced European healthcare systems. This study aims to research migrant healthcare workers through an intersectional health system-related approach, using Germany as a case study.MethodsAn intersectional research framework was created and a rapid scoping study performed. Secondary analysis of selected items taken from two COVID-19 surveys was undertaken to compare perceptions of national and foreign-born healthcare workers, using descriptive statistics.ResultsAvailable research is focused on worst-case pandemic scenarios of Brazil and the United Kingdom, highlighting racialised discrimination and higher risks of migrant healthcare workers. The German data did not reveal significant differences between national-born and foreign-born healthcare workers for items related to health status including SARS-CoV-2 infection and vaccination, and perception ...

Frontiers in Psychiatry

IntroductionThe coronavirus disease 2019 (COVID-19) pandemic impacted how people perform their da... more IntroductionThe coronavirus disease 2019 (COVID-19) pandemic impacted how people perform their daily lives in manifold and sometimes massive ways. Particularly, individuals who are at high risk for a severe disease progression, like immunocompromised people, may have experienced drastic changes in social participation during the pandemic. A COVID-19 basic vaccination may have changed the safety behavior of immunocompromised individuals in terms of infection risk and thereby influence social participation and mental wellbeing.MethodsThis study aims to investigate self-perceived social participation at baseline before and at follow-up 1 and 6 months after basic vaccination. Beginning in March 2021, 274 immunocompromised persons 18 years or older were enrolled in the COVID-19 Contact Immune study (CoCo study) in Lower Saxony, Germany. Measurements were performed at three time points regarding social participation [Index for the Assessment of Health Impairments (IMET)], mental health [P...

Zeitschrift für Rheumatologie

Frontiers in Medicine

Background: Sicca syndrome represents a heterogeneous group of conditions, such as Sjögren syndro... more Background: Sicca syndrome represents a heterogeneous group of conditions, such as Sjögren syndrome, causing xerophthalmiaand xerostomia. This study characterizes in depth patients with Sicca syndrome and evaluates salivary gland ultrasound (SGUS).Methods: Principal component analysis and hierarchical clustering of clinical parameters, such as ESSPRI, ESSDAI and laboratory data, were performed on all referrals for assessment of Sicca symptoms between October 2018 and March 2021. SGUS and labial gland biopsies were compared across groups.Results: A total of 583 patients were assessed. Objective dryness was confirmed in 73% of the patients. Cluster analysis identified 3 groups with post-hoc analysis confirming distinct phenotypes: Somatic Group (283/583; 49%) with more frequent symptoms but limited objective dryness; Dry Without Autoimmune Features (DAFneg, 206/584; 35%), and Dry With Autoimmune Features (DAFpos, 94/584;16%). DAFpos patients had highest autoantibody titers (anti-SSA(R...

Background Haemodialysis patients are at-risk for severe COVID-19 and were among the first to rec... more Background Haemodialysis patients are at-risk for severe COVID-19 and were among the first to receive a fourth COVID-19 vaccination. Methods We analysed humoral responses by multiplex-based IgG measurements against the receptor-binding domain (RBD) and ACE2-binding inhibition towards variants of concern including Omicron in haemodialysis patients and controls after triple BNT162b2 vaccination and in dialysis patients after a fourth full-dose of mRNA-1273. T-cell responses were assessed by interferon gamma release assay. Findings After triple BNT162b2 vaccination, anti-RBD B.1 IgG and ACE2 binding inhibition reached peak levels in dialysis patients, but remained inferior compared to controls. Whilst we detected B.1-specific ACE2 binding inhibition in 84% of dialysis patients after three BNT162b2 doses, binding inhibition towards the Omicron variant was only 38% and declining to 16% before the fourth vaccination. By using mRNA-1273 as fourth dose, humoral immunity against all SARS-CoV...

Frontiers in Public Health

Immunocompromised persons are at an increased risk for a severe SARS-CoV-2 infection and their sa... more Immunocompromised persons are at an increased risk for a severe SARS-CoV-2 infection and their safety behaviors may influence their social participation. Vaccinated persons have a lower incidence of infection and severe disease when infected compared to non-vaccinated persons. Therefore, their behavior may change and their social participation may increase after a complete vaccination. The aim of this study was to explore social participation of immunocompromised persons before and after complete COVID-19 vaccination. Between March and September 2021, 274 immunocompromised participants were recruited. Survey data were collected at baseline and follow-up from 194 participants including the Index for the Assessment of Health Impairments [IMET], Patient Health Questionnaire-4 [PHQ-4], subjective health status and quality of life. At baseline, participants were not yet completely vaccinated. Complete vaccination was achieved prior to the follow-up questionnaire. IMET scores decreased si...

Annals of the Rheumatic Diseases

BackgroundSicca syndrome represents a heterogeneous group of conditions, including Sjögren syndro... more BackgroundSicca syndrome represents a heterogeneous group of conditions, including Sjögren syndrome, causing xerophthalmia and xerostomia.ObjectivesThis study characterizes in depth patients with Sicca syndrome and evaluates salivary gland ultrasound (SGUS) in this cohort.MethodsPrincipal component analysis and hierarchical clustering of clinical parameters, including ESSPRI, ESSDAI and laboratory data were performed on all referrals for assessment of Sicca symptoms between October 2018 and March 2021. SGUS and labial gland biopsies were compared across groups.Results583 patients were assessed. Objective dryness was confirmed in 73% of patients. Cluster analysis identified 3 groups with post-hoc analysis confirming distinct phenotypes: Somatic Group (283/583; 49%) with higher reported symptoms but limited objective dryness; Dry Without Autoimmune Features (DAFneg, 206/532; 35%) and Dry With Autoimmune Features (DAFpos, 94/532; 16%). DAFpos patients had highest autoantibody titres (S...

European Journal of Medical Research

Background The influence of immunosuppressive therapy on immunogenicity after COVID-19 vaccinatio... more Background The influence of immunosuppressive therapy on immunogenicity after COVID-19 vaccination remains unclear. This study surveys patients who receive immunosuppressive therapy about whether or not they paused their immunosuppressive medication while receiving SARS-CoV-2 vaccination. Methods In this prospective observational study, immunosuppressed participants were asked by phone and email about their medication before and during vaccination and who—if anyone—advised them to pause their medication. In addition, a baseline paper-based questionnaire contributes general characteristics regarding age, gender, immunosuppressive medication(s) and the chronic disease(s) requiring immunosuppressive therapy. Results Of 207 surveyed participants, 59 persons (28.5%) paused their immunosuppressive medication before/during vaccination. Persons with rheumatic conditions and women were significantly more likely to pause immunosuppressive therapy than others. Over half of those who paused the...

Somatoform symptoms. (DOCX 13 kb)

Pathogens, 2022

Background: Infections, as well as adverse birth outcomes, may be more frequent in migrant women.... more Background: Infections, as well as adverse birth outcomes, may be more frequent in migrant women. Schistosomiasis, echinococcosis, and hepatitis E virus (HEV) seropositivity are associated with the adverse pregnancy outcomes of fetal growth restriction and premature delivery. Methods: A cohort study of 82 pregnant women with a history of migration and corresponding delivery of newborns in Germany was conducted. Results: Overall, 9% of sera tested positive for anti-HEV IgG. None of the patients tested positive for anti-HEV IgM, schistosomiasis, or echinococcus serology. Birth weights were below the 10th percentile for gestational age in 8.5% of the neonates. No association between HEV serology and fetal growth restriction (FGR) frequency was found. Conclusions: In comparison to German baseline data, no increased risk for HEV exposure or serological signs of exposure against schistosomiasis or echinococcosis could be observed in pregnant migrants. An influence of the anti-HEV serology...

Reports suggest that COVID-19 vaccine effectiveness is decreasing, either due to waning immune pr... more Reports suggest that COVID-19 vaccine effectiveness is decreasing, either due to waning immune protection, emergence of new variants of concern, or both. Heterologous prime/boost vaccination with a vector-based approach (ChAdOx-1nCov-19, ChAd) followed by an mRNA vaccine (e.g. BNT162b2, BNT) appeared to be superior in inducing protective immunity, and large scale second booster vaccination is ongoing. However, data comparing declining immunity after homologous and heterologous vaccination as well as effects of a third vaccine application after heterologous ChAd/BNT vaccination are lacking. We longitudinally monitored immunity in ChAd/ChAd (n=41) and ChAd/BNT (n=88) vaccinated individuals and assessed the impact of a second booster with BNT in both groups. The second booster greatly augmented waning anti-spike IgG but only moderately increased spike-specific CD4+ and CD8+ T cells in both groups to cell frequencies already present after the boost. More importantly, the second booster ...

European Journal of Public Health, 2020

Background The importance of a sustainable health workforce is increasingly recognised. However, ... more Background The importance of a sustainable health workforce is increasingly recognised. However, the specialised heath workforce remains marginal in health workforce planning, policy and research. This paper aims to improve the integration of small specialised professional groups in health workforce governance and to critically assess existing tools, using Germany and rheumatology physicians as a case study. Methods A qualitative explorative approach was applied, which draws on a scoping review of the literature, public statistics and expert information. The National Health Workforce Accounts (NHWA) and the WHO 'AAAQ' framework served as guidance to assess workforce development in rheumatology in Germany. Results On average physician density is high in Germany, yet access to specialised care may be seriously delayed and services may not be accessible to all patients; e.g. currently only half of the patients with spondyloarthritis are treated by a rheumatologist which impacts...

Zeitschrift für Rheumatologie, 2021

Zusammenfassung Hintergrund In der ambulanten Versorgung wurde Telemedizin im Lockdown von März b... more Zusammenfassung Hintergrund In der ambulanten Versorgung wurde Telemedizin im Lockdown von März bis Mai 2020 eingesetzt. Ziel der Studie war es, Patienten aus einer Praxis und der Hochschulambulanz bezüglich Patientenzufriedenheit mit Telemedizin, COVID-19-Sorgen und Impfverhalten auszuwerten sowie die Gesprächsführung durch eine rheumatologische Fachassistenz (RFA) mit einem Arzt zu vergleichen. Methoden Patienten mit rheumatoider Arthritis, Psoriasisarthritis oder Spondyloarthritis ohne Therapieänderung seit der letzten Vorstellung wurde ein telemedizinischer Ersatztermin im Rahmen dieser Studie bei Terminabsage durch die versorgenden Zentren angeboten. Randomisiert wurden sie von einem Arzt oder einer RFA (RFA nur Universität) telemedizinisch versorgt. Die Anamnese erfolgte telefonisch standardisiert mittels Fragebogen. Die Krankheitsaktivität wurde mittels modifizierten Clinical Disease Activity Score (CDAI) und BASDAI festgestellt. Im Anschluss erhielten die Patienten einen pse...

Im Jahr 2016 wurden in Deutschland mehr als 700 000 Asylerstantrage gestellt. Das haufigste Herku... more Im Jahr 2016 wurden in Deutschland mehr als 700 000 Asylerstantrage gestellt. Das haufigste Herkunftsland war Syrien. Der Anteil weiblicher Migranten lag in verschiedenen Betrachtungen zwischen 20 und 35 %. Mit schwangeren Migrantinnen muss in 3,5 % gerechnet werden. In dieser vulnerablen Patientengruppe sollte gezielt nach Risikofaktoren fur einen ungunstigen Verlauf der Schwangerschaft gesucht werden. Im Hinblick auf das infektiologische, tropenmedizinische Erregerspektrum sind dies vor allem die Tuberkulose und parasitare Erkrankungen. Bei Afrikanern sind Bilharziose und Malaria von hoher Relevanz. Bei Lateinamerikanern steht die Chagas-Erkrankung im Vordergrund. Aktuelle Studien zum Erkrankungsspektrum von Migrantinnen, die ein Kind erwarten, stehen bisher nicht zur Verfugung.

Journal of Clinical Medicine, 2020

The phenotype of primary immunodeficiency disorders (PID), and especially common variable immunod... more The phenotype of primary immunodeficiency disorders (PID), and especially common variable immunodeficiency (CVID), may be dominated by symptoms of autoimmune disorders. Furthermore, autoimmunity may be the first manifestation of PID, frequently preceding infections and the diagnosis of hypogammaglobulinemia, which occurs later on. In this case, distinguishing PID from hypogammaglobulinemia secondary to anti-inflammatory treatment of autoimmunity may become challenging. The aim of this study was to evaluate the diagnostic accuracy of peripheral blood lymphocyte phenotyping in resolving the diagnostic dilemma between primary and secondary hypogammaglobulinemia. Comparison of B and T cell subsets from patients with PID and patients with rheumatic disease, who developed hypogammaglobulinemia as a consequence of anti-inflammatory regimes, revealed significant differences in proportion of naïve B cells, class-switched memory B cells and CD21low B cells among B cells as well as in CD4+ mem...

Cellular & Molecular Immunology, 2021

Patients undergoing chronic hemodialysis were among the first to receive SARS-CoV-2 vaccinations ... more Patients undergoing chronic hemodialysis were among the first to receive SARS-CoV-2 vaccinations due to their increased risk for severe COVID-19 disease and high case fatality rates. To date, there have been minimal longitudinal studies in hemodialysis patients to ascertain whether protection offered by vaccination is long-lasting. To assess how surrogates for protection changed over time, we examined both the humoral and cellular response in a previously reported cohort of at-risk hemodialysis patients and healthy donors, four months after their second dose of Pfizer BNT162b2. Compared to three weeks post-second vaccination, both cellular and humoral responses against the original SARS-CoV-2 isolate as well as variants of concern were significantly reduced, with some dialyzed individuals having no B- or T-cell response. Our data strongly support the need for a third booster in hemodialysis patients and potentially other at-risk individuals.

Zeitschrift für Rheumatologie, 2021

Zusammenfassung Hintergrund und Fragestellung Fachkräftemangel in der Rheumatologie in Deutschlan... more Zusammenfassung Hintergrund und Fragestellung Fachkräftemangel in der Rheumatologie in Deutschland ist als Versorgungsproblem erkannt. Die Gesundheitspolitik hat mit neuen Planungszielen reagiert, aber es fehlen effektive Interventionsstrategien. Ziel dieser Studie ist ein systematischer berufsstruktureller Überblick, um die Grundlage für Interventionen zu verbessern und Möglichkeiten für ein effektives Fachkräftemanagement aufzuzeigen. Methode Die WHO National Health Workforce Accounts (NHWA) dienen als konzeptioneller Rahmen. Ausgewählt werden 4 Indikatoren: Personalbestand, Arbeitsmarktbewegungen, Komposition und Weiterbildung. Die Exploration von Entwicklungstrends stützt sich auf vergleichende Analysen von Altersgruppen und Zeitreihen. Die Erhebung nutzt öffentliche Statistiken und andere Sekundärliteratur; die Auswertung erfolgt deskriptiv. Ergebnisse In Deutschland sind 1076 Ärzt*innen mit einer Facharztqualifikation oder Schwerpunktbezeichnung in der internistischen Rheumato...

BackgroundPatients with chronic renal insufficiency on intermittent hemodialysis face an increase... more BackgroundPatients with chronic renal insufficiency on intermittent hemodialysis face an increased risk of COVID-19 induced mortality and impaired vaccine responses. To date, only few studies addressed SARS-CoV-2 vaccine elicited immunity in this immunocompromised population.MethodsWe assessed immunogenicity of the mRNA vaccine BNT162b2 in at risk dialysis patients and characterized systemic cellular and humoral immune responses in serum and saliva using interferon γ release assay and multiplex-based cytokine and immunoglobulin measurements. We further compared binding capacity and neutralization efficacy of vaccination-induced immunoglobulins against emerging SARS-CoV-2 variants of concern B.1.1.7, B.1.351, B.1.429 and Cluster 5 by ACE2-RBD competition assay.FindingsPatients on intermittent hemodialysis exhibit detectable but variable cellular and humoral immune responses against SARS-CoV-2 and variants of concern after a two-dose regimen of BNT162b2. Although vaccination-induced i...

Clinical Infectious Diseases, 2021

Background Vaccine-induced neutralizing antibodies are key in combating the coronavirus disease 2... more Background Vaccine-induced neutralizing antibodies are key in combating the coronavirus disease 2019 (COVID-19) pandemic. However, delays of boost immunization due to limited availability of vaccines may leave individuals vulnerable to infection and prolonged or severe disease courses. The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOC)—B.1.1.7 (United Kingdom), B.1.351 (South Africa), and P.1 (Brazil)—may exacerbate this issue, as the latter two are able to evade control by antibodies. Methods We assessed humoral and T-cell responses against SARS-CoV-2 wild-type (WT), VOC, and endemic human coronaviruses (hCoVs) that were induced after single and double vaccination with BNT162b2. Results Despite readily detectable immunoglobulin G (IgG) against the receptor-binding domain of the SARS-CoV-2 S protein at day 14 after a single vaccination, inhibition of SARS-CoV-2 S-driven host cell entry was weak and particularly low for the B.1.351...