According to @lookner, this is a case not from travel, unknown origin.
New Case of Novel Coronavirus in Northern California: CDC
How would the CDC catch cases like this if they do not expand their testing? @lookner
Confirmed by CDC now...
but no details what city
no travel history...no contacts to known cases
so there is a secret spreader
IOW, there’s at least one carrier who’s out there infecting people.
A mutation? Very strange.