… COVID-19 in Santa Clara County. Our prevalence estimate of 2.76% applied to Santa Clara
County’s … Since the development of antibodies takes ∼7 days from the time of infection, that …

… that the rate of infection of COVID-19 in Santa Clara county was between 2.49% and 4.16%, …
at lower estimates of the rate of COVID-19 in Santa Clara county. Re-analyzing their data, …

… of COVID-19, without initial mention of SARS-CoV-2 antibody … California ranged from 4.65%
among adults in neighboring LA 7 to 2.8% among adults and children in Santa Clara County …

… that the rate of infection of COVID-19 in Santa Clara county was between 2.49% and 4.16%, …
at lower estimates of the rate of COVID-19 in Santa Clara county. Re-analyzing their data, …

… we adjusted the statewide seroprevalence estimate to account for antibody waning below a
… epidemic in California. We estimated the reported fraction (the number of COVID-19 cases …

… for anti–SARS-CoV-2 RBD IgG antibodies to all of its HCP. By the start of … California public
health records broadly as well as from Santa Clara and San Mateo Counties, the 2 counties …

… , Marin, San Francisco, San Mateo, and Santa Clara counties, … excluding persons after a first
dose of a COVID-19 vaccine, … In addition, the antibody tests we used were of relatively high …

… to our conclusion from the Santa Clara Seroprevalence Study [2]… and San Francisco 1%
seroprevalence to the COVID-19 spike … in Santa Clara County (California), Idaho, Los Angeles (…

… of COVID-19. Utilizing the period prevalence of SARS-CoV-2–reactive antibodies across a
… It also coincides with the introduction of COVID-19 vaccination in the US Seroprevalence in …

… with one of the earliest outbreaks, our seroprevalence was low … to a patient later confirmed
to have COVID-19. This may be … tested positive for IgG antibodies and acute SARS-CoV-2 …