The upside is the virus is live and active in California. Besides the 2 confirmed cases, there are 4 others under observation. One is from Mountain View, this person is not a world traveller - meaning it's probably human to human contact.
Considering the R0, the infection rate, and the incubation period, that means there are a minimum of 12 other infected walking around right now spreading the disease. That number is going to grow exponentially over the next week and they won't even know they are sick.
California has one of the worst healthcare delivery systems in the US. Undocumented immigrants primarily use a) clinics and b) emergency rooms for routine medical treatment. A Minute Clinic is not going to spot this, they're going to hand out Tamaflu and send people on their way. OTOH, emergency preparedness has already kicked in at places that provide real treatment. San Francisco and San Diego are putting out calls to other states asking for nurses to help in a crisis.
We'll see how the socialist paradise makes out. My gut tells me we will see a statewide quarantine before long.