A medical worker administers a rapid COVID-19 test in Oakland, Calif., earlier this month. Coronavirus cases are once again surging across much of the country, reaching almost 100,000 on Friday.

A medical worker wearing personal protective equipment (PPE) administers a rapid Covid-19 test in Oakland, California, U.S., on Monday, Oct. 12, 2020. Oakland International Airport last week began offering free, rapid-result Covid-19 testing programs, first for airport employees and eventually for the general public. Photographer: David Paul Morris/Bloomberg via Getty Images