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ABSTRACT: Background
Understanding the association of prior SARS-CoV-2 infection with subsequent reinfection has public health relevance. Objective
To explore COVID-19 severity and SARS-CoV-2 infection and reinfection rates. Design
Retrospective cohort study. Setting
Boston, Massachusetts, during the first COVID-19 surge (01/01/2020–05/31/2020; Period-1) and after the first surge (06/01/2020–02/28/2021; Period-2); Period-2 included the second surge (11/01/2020–02/28/2021). Participants
Patients in an academic medical center and six community health centers who received a clinical diagnosis of COVID-19 between 01/01/2020 and 05/31/2020 or SARS-CoV-2 testing between 01/01/2020 and 02/28/2021. Measurements
COVID-19 severity was compared between Peri
SUBMITTER: Casey S
PROVIDER: S-EPMC9547391 | biostudies-literature | 2022 Oct
REPOSITORIES: biostudies-literature