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Germany’s Low Sars-Cov-2 Seroprevalence Confirms Effective Containment in 2020: Results of the Nationwide RKI-SOEP Study

Diskussionspapiere extern

Hannelore Neuhauser, Angelika Schaffrath Rosario, Hans Butschalowsky, Sebastian Haller, Jens Hoebel, Janine Michel, Andreas Nitsche, Christina Poethko-Muller, Franziska Prutz, Martin Schlaud, Hans W. Steinhauer, Hendrik Wilking, Lothar H. Wieler, Lars Schaade, Stefan Liebig, Antje Goswald, Markus M. Grabka, Sabine Zinn, Thomas Ziese

Berlin: RKI, 2021, 26 S.
(medRxiv Preprint)


Pre-vaccine SARS-CoV-2 seroprevalence data from Germany are scarce outside hotspots, andsocioeconomic disparities remained largely unexplored. The nationwide RKI-SOEP study with 15,122adult participants investigated seroprevalence and testing in a supplementary wave of the Socio-Economic-Panel conducted predominantly in October-November 2020. Self-collected oral-nasalswabs were PCR-positive in 0.4% and Euroimmun anti-SARS-CoV-2-S1-IgG ELISA from dry capillaryblood in 1.3% (95% CI 0.9-1.7%, population-weighted, corrected for sensitivity=0.811,specificity=0.997). Seroprevalence was 1.7% (95% CI 1.2-2.3%) when additionally adjusting forantibody decay. Overall infection prevalence including self-reports was 2.1%. We estimate 45% (95%CI 21-60%) undetected cases and analyses suggest lower detection in socioeconomically depriveddistricts. Prior SARS-CoV-2 testing was reported by 18% from the lower educational group comparedto 25% and 26% from the medium and high educational group (p<0.0001). Symptom-triggered testfrequency was similar across educational groups. However, routine testing was more common inlow-educated adults, whereas travel-related testing and testing after contact with an infected personwas more common in highly educated groups. In conclusion, pre-vaccine SARS-CoV-2-seroprevalencein Germany was very low. Notified cases appear to capture more than half of infections but mayunderestimate infections in lower socioeconomic groups. These data confirm the successfulcontainment strategy of Germany until winter 2020.

Sabine Zinn

Vice Director SOEP and Division Head Survey Methodology and Management in the German Socio-Economic Panel study Department

Hans Walter Steinhauer

Survey Statistician in the German Socio-Economic Panel study Department

Markus M. Grabka

Board of Directors SOEP and Acting Division Head Knowledge Transfer in the German Socio-Economic Panel study Department

Topics: Health

Keywords: Seroprevalence, SARS-CoV-2, COVID-19, antibody, diagnostic test