looks to me like california has gotten serious about monitoring the thousands still flying in from china and other parts of asia ... friend in san fran said 500/day were flying in from china ... the ones from the PRC are U.S. citizens (not chinese), but the coronavirus makes no distinction about nationality ...
Or race, or politics, or what clothes you wear, or economic status, or a multitude of other things.
It's why we should not be playing around with (imho) biowarfare. And yes, I think the PRC was doing just that and now their Frankenstein got loose.
My real ire is for the people playing politics with this. They should be subjected to the Rainbow Six resolution.