the relevant study:
COVID-19 Antibody Seroprevalence in Santa Clara County, California
medrxiv.org/content/10.1101/2020.04.14.20062463v1
research on the mortality of covid-19

the relevant study:
COVID-19 Antibody Seroprevalence in Santa Clara County, California
medrxiv.org/content/10.1101/2020.04.14.20062463v1