I think what Trump said is not that the coronavirus is a hoax, but that a lot of the reporting on it has been an overblown hoax.
Objectively, about 4,000 people worldwide have died from coronavirus, about 3,000 of them in China.
In a typical flu season, about 250,000 to 650,000 die worldwide, let's say an average of about 400,000. That means the coronavirus outbreak would have to get about 100 times worse than it already is, to cause as many deaths as a typical flu season. Yet this is rarely (if ever) pointed out by CNN, etc., who seem to have a political objective in spreading the panic. Would they be making such a fuss if Obama, rather than Trump, were president?
I don't think so...