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Cohort (56% female; mean age, 45.6 years) retention was 75 to 98%. Increased risk for seropositivity was detected in several high-exposure groups, especially nurses. Unreported infections dropped from 92 to 29% during the study. \u201cContact to COVID-19\u2013affected\u201d was the strongest risk factor, whereas public transportation, having children in school, or tourism did not affect infection rates. With the first SARS-CoV-2 cohort study, we provide a transferable model for effective surveillance, enabling monitoring of reinfection rates and increased preparedness for future pandemics.<\/jats:p>","DOI":"10.1126\/sciadv.abm5016","type":"journal-article","created":{"date-parts":[[2022,4,15]],"date-time":"2022-04-15T13:58:36Z","timestamp":1650031116000},"source":"Crossref","is-referenced-by-count":24,"title":["One-year surveillance of SARS-CoV-2 transmission of the ELISA cohort: A model for population-based monitoring of infection risk"],"prefix":"10.1126","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2102-3431","authenticated-orcid":true,"given":"Christine","family":"Klein","sequence":"first","affiliation":[{"name":"Institute of Neurogenetics, University of L\u00fcbeck and University Hospital Schleswig-Holstein, Campus L\u00fcbeck, L\u00fcbeck, 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