Let us suppose, just hypothetically, that Covid-19 really is as bad as professors of medicine are saying. 60% of population in a high income country is infected and 1% die - figures I've seen from a well respected figure. Of course you may have a different opinion on what numbers should look like, but this puts us into 1918 Spanish flu comparable territory
Under such a scenario while large numbers of people are sick, would society want a complete shutdown of commercial aviation ? Wuhan airport closed, but Shanghai-Pudong remains open albeit running at about 20% of normal traffic levels