Technology will likely play a huge part in our exit strategy, as it already apparent in China, with contact and health tracking apps. With appropriate tracking apps, basic ppe, disinfectant measures and hand hygenine, the risk in necessary "close contact" situations like small aircaft cockpits can minimised and managed. The vulnerable demographich sector might be staying home & self isolating (with their household occupants) for a while longer, which may well affect our older FI but economic necessity will mandate a risk managed exit strategy way, way before a vaccine is operational.
Slightly bigger picture here though...aviation, travel & leisure industries pretty much top of everybody's list when it comes to massive global fallout and shakeup post Covid19, so as somebody alread posted, nobody yet knows how much of this industry will still be a) standing b) needed in years to come. And I'm not a gloom monger...just a realist who can read, watch and listen.