Honestly, now seems like a great time to invest, to me.
If I had some extra cash I'd probably do so.
Diseases don't last forever. Things'll still be needed after they're gone. The panicked falling is a great opportunity to get some investment back, assuming you don't invest to things that run the risk of being shut down due to the disease anyway, like Chinese factory reliant stuff.
Maybe avoid more luxary sorts of things, just in case. But, necessities will always be needed.