They are doing a study in Calif. to see if the corona existed in Calif in the early fall. They reported a vicious flu season with symptoms very similar to the corona as far back as November,
people tested negative for the common flu, they did not have "covid" test available then.
If they find the "covid" antibodies in people sick back in November this changes everything..
https://www.ksbw.com/article/new-st...sible-herd-immunity-to-covid-19/32073873