Retrospective Screening for SARS-CoV-2 RNA in California, USA, Late 2019.
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ABSTRACT: To investigate the possibility of earlier cases of severe acute respiratory syndrome coronavirus 2 infection than previously recognized, we retrospectively tested pooled samples from 1,700 persons with respiratory signs/symptoms seen at Stanford Health Care, Palo Alto, California, USA, during the last 2 months of 2019. We found no evidence of earlier infection.
SUBMITTER: Hogan CA
PROVIDER: S-EPMC7510744 | biostudies-literature |
REPOSITORIES: biostudies-literature
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