%0 Journal Article %T SARS-CoV-2 serosurvey across multiple waves of the COVID-19 pandemic in New York City between 2020-2023. %A CarreƱo JM %A Wagner AL %A Monahan B %A Singh G %A Floda D %A Gonzalez-Reiche AS %A Tcheou J %A Raskin A %A Bielak D %A Morris S %A Fried M %A Yellin T %A Sullivan L %A %A Sordillo EM %A Gordon A %A van Bakel H %A Simon V %A Krammer F %J Nat Commun %V 15 %N 1 %D 2024 Jul 11 %M 38992013 %F 17.694 %R 10.1038/s41467-024-50052-2 %X Sero-monitoring provides context to the epidemiology of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections and changes in population immunity following vaccine introduction. Here, we describe results of a cross-sectional hospital-based study of anti-spike seroprevalence in New York City (NYC) from February 2020 to July 2022, and a follow-up period from August 2023 to October 2023. Samples from 55,092 individuals, spanning five epidemiological waves were analyzed. Prevalence ratios (PR) were obtained using Poisson regression. Anti-spike antibody levels increased gradually over the first two waves, with a sharp increase during the 3rd wave coinciding with SARS-CoV-2 vaccination in NYC resulting in seroprevalence levels >90% by July 2022. Our data provide insights into the dynamic changes in immunity occurring in a large and diverse metropolitan community faced with a new viral pathogen and reflects the patterns of antibody responses as the pandemic transitions into an endemic stage.