How are you planning to handle it?
At this point my plan (I'm in Washington state, US) is to tell people to not show up within 72 hours of a cough or fever, like the schools are doing here. I have a small dedicated group of students who I trust to follow this advice. I don't know how to do a "no contact" class other than spend a couple classes on kata and concepts, and my classes are mostly application-focused, which compounds the weight of the decision.
Of course, there is a risk here no matter what, do you have plans for your dojo? Are you thinking about just shutting down if the outbreak hits your area?