Virus jumping the quarantine changed things. Really tough to call at this point IMO. There are probably already thousands of cases in the USA, so it's entirely possible things will escalate dramatically in the next 2-3 weeks, leading to mass production shutdowns, school closures, etc.
Eventually the acute phase will pass and you can bet CBs and governments around the world will be jamming the accelerator to the floor. The problem for U.S. markets is going to be the potential Sanders victory, which will weigh on things as we move into summer. So, perhaps all the liquidity will find somewhere else to go.
Okay, so, there are probably, thousands of Americans infected as a couple of hundred just went to China recently from New York. Some people are just damn stupid and there is no cure for stupidity so, what do you do? You engage in wholesale panic, selling all your holdings, liquidating your 401K, IRA, etc.? So, join the panic and sell, sell sell and who gets hurt the most? The big hedge funds with deep pockets and run the market or the retail trader who in his hysteria and panic, sold his shares at the bottom in addition to locking in permanently, huge losses? Selling all your stock is not going to stop the Corona Virus. The US government agencies are doing their best so, what else do people want? Personally, I think you have to educate yourself and protect yourself the most. How? Start with how it is generally, spread which is with your dirty hands. This is from an ICU nurse, wash your hands often and whatever you do, do not put your dirty hands on your nose, ears, eyes without washing them thoroughly, first. Avoid public places if you can like the mall, restaurants, etc. The reason is obvious, an infected person can sneeze or cough 10 feet away and transmit the virus thru the air. Travelling especially, via airplane should be avoided. Again, this is common sense, air circulated in a closed airplane will infect everyone on board as the air is pumped and circulated over and over spreading any virus from an infected person.