Trying to blame someone for the virus seems like blaming someone for the rain. Or hurricanes. Oh wait, we can fix those by nuking them.
That said, and all joking aside, by letting it run wild in the USA we’re giving the virus a nice little playground in which to mutate into something far more deadly.
So maybe eventually they will be able to blame someone someday for the Trump Plague.
Here’s a good article describing in a very even-keeled non-partisan way how every other administration since the first Bush has worked with China preventing infectious diseases.