COVID-19 Testing In California Dropped By Over 30% In Recent Weeks. That Could Be A Good Sign Listen Update RequiredTo play audio, update browser or Flash plugin. A phlebotomist takes a finger prick blood sample at a drive-through COVID-19 testing site in Bolinas on April 22, 2020. Bolinas is attempting to test the entire town in conjunction with a UCSF study, one of the first efforts of its kind in California Photo by Anne Wernikoff for CalMatters The number of COVID-19 tests processed in California has dropped by more than 30% in recent weeks. Public health experts say the decline in testing makes sense — and is actually a good sign. The number of positive cases have steadily declined since the surge over the holidays, and test positivity rates are also way down.