Like everyone else, I've thought a good bit about this. The severity and impact of the virus is unknown, I'm hoping for the best but preparing for the worst.
I'm fortunate that all of my units cash flow and are fundamentally sound, so my short-term goal is to cover my expenses. If a tenant can't make rent, I'll ask them to pay what they can. If they can't pay anything, I have a healthy cash reserve, a HELOC and two week ago I borrowed 50k from my 401k to buy a dip and show compassion to my tenants who have the same worries and concerns as everyone else.
For what it's worth, I also have a flip finishing in three weeks. It seems possible that things in Massachusetts will be very, very slow. This week I talked to my commercial lender to see if they'd extend a commercial line of credit against the property if I rented it out. The commercial line would be interest only, so it wouldn't take much for the property to cash flow. I wouldn't make a profit, but I'd be able to pull all of my money out and sell it 2 years tax free.