Trump didn't have to do anything which is why his actions have been the definition of stupidty.
Let his team of medical experts do there thing, just hand over the response to Fauci and even if things turn out wrong you could say "we followed the medical advice of the nations top medical experts" this is what defacto the Democrats have done.
Trump however listen to Kusher who told him (who just told Trump what Trump wanted to hear) is that his election chances are tied into the economy and immigration. So banning Chinese from traveling to the US is good
Closing down the business is bad
Ignoring the pandemic good