I'm out in Southern California - and yes, things have slowed done quite a bit - people are starting to take this very seriously.
The colleges/universities have sent students home to make the dorms available for quarantine, local gov't taking action to get homeless off the streets, as that population is very much at risk.
As mention by others in CA, essentials are open - starting to see some limits on purchases, traffic is down significantly - my 45 mile drive up to Carlsbad is down to 40 minutes from the usual hour and a half.
We're in better shape than most - I've got team members in the UK, Germany, Italy, Poland, and India - Italy and Germany are totally locked down, UK is getting there, India is as well. We're cloud-centric, so work continues. I had to move equipment from the office to set up a lab here at the house. We've asked folks to work from home, only coming in if absolutely necessary.
Lost an old friend last week due to Coronavirus, but he had chronic COPD to begin with, and he was in that age group (60-69) where the risk of complications is much higher...
Common sense says to avoid getting infected is the same as it is with the flu or common cold - if sick, stay home, wash hands, social distancing works.
Be safe out there.
Useful link...
https://coronavirus.jhu.edu/map.html