Beginning April 8, 2020, we enrolled 1787 frontline heath workers who were asymptomatic for COVID-19 into a longitudinal surveillance study. During that time 4 healthcare workers and 6 first responders tested positive for SARS-CoV-2 by RT-PCR. Additionally, 43 healthcare workers and 55 first responders had detectable IgG antibodies to SARS-CoV-2.
Competing Interest Statement
The authors have declared no competing interest.
This work was supported by lead funders AIDS Healthcare Foundation, The Shurl and Kay Curci Foundation, Elizabeth R. Koch Foundation, The Horn Foundation, and Steven & Alexandra Cohen Foundation, and many others who have also given generously to facilitate this research.
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The details of the IRB/oversight body that provided approval or exemption for the research described are given below:
This study was approved by the UCLA institutional review board on March 25, 2020, IRB# 20-000478.
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Data is not publicly available but interested parties should contact study authors for inquiries regarding data access.