Antibody Status and Incidence of SARS-CoV-2 Infection in Health Care Workers.
N Engl J Med. 2021 Feb 11;384(6):533-540. doi: 10.1056/NEJMoa2034545. Epub 2020 Dec 23.
N Engl J Med. 2021.
PMID: 33369366
Free PMC article.