I'm in the exact same boat. Two weeks ago I thought about leaving to stay with family who live an hour outside Boston. Two things stopped me. The first was my family members are all still going to work (even though Boston is pretty bad and there's a handful of confirmed cases in their local area). The second was I worried about bringing it back from New York with me an infecting my retired parents.

The nice thing about NYC is that I literally don't have to leave my apartment. I get all groceries delivered (perishables from Whole Foods, non-perishables from Walmart). Medication for my condition is delivered as well. I'm blessed enough to have a doorman so the only exposure I have to the outside world is going down to my lobby to pick up the packages which I do late at night to avoid running into anyone else.

My only concern would be if I did get sick and was hundreds of miles away from any of my family members. However as far as risk of getting sick goes I'm pretty confident that bunkering in my apartment is the right call.