The Bay area is not setting up the area for herd immunity -- there are only a hundred cases a day, so it would take many decades to get herd immunity (effectively never, given births and gradual loss of immunity).
There could be anywhere from 5-100x that amount. Lots of people without or with very mild symptoms. Very hard to know without 10-100x the tests we are doing.
There could be anywhere from 5-100x that amount. Lots of people without or with very mild symptoms. Very hard to know without 10-100x the tests we are doing.