Experience with Voluntary SARS-CoV-2 Testing of Asymptomatic Staff at the National Institutes of Health for One Year.

Voluntary asymptomatic SARS-CoV-2 testing was provided by NIH Clinical Center over a year. Of 105,927 tests, 0.2% were positive. Of eligible staff, 79% participated with variable frequency and 61% of positive individuals had symptoms at the time of testing. Saliva was chosen as an option less frequently than mid-turbinate collection.