People will just double down. The conspiracy will be that it's just an attempt by the government to get you to vaccinate or something.
https://nypost.com/2016/09/20/i-was-an-anti-vax-crackpot-unt...
https://www.self.com/story/from-anti-to-pro-vaccine
https://www.theatlantic.com/health/archive/2015/03/i-used-to...
I think you undervalue this administration ability to spin. Did you watch President speech yesterday? Everything is wonderful, everything is great and Mike Pence in charge (with at best questionable history of handling crisises in his own state). If you believe we will have real death tolls from Corona and yet Trump will not spin it that into some form of good news (because more haven't died for example?) you haven't paid attention to politics long enough, I'm afraid.
But pretending there wasn't problems with Clinton isn't going to help.
Trump would never have won against Obama for example, but against someone who sh#ts on their core voter base even he had a chance and now Republicans seems to be defending his every move like soccer fans defending their favorite team in spite of all their problems.
(Oh, and the Democrats keep defending Hillary despite all her craziness.)
That's a bit more influential than a liked facebook post with false numbers.