In Slate, infectious disease specialist Kent Sepkowitz writes:

In early March, Trump told Sean Hannity that, despite million [sic] of cases and thousands of deaths, the Obama administration “didn’t do anything about” H1N1. On Friday, he tweeted that the Obama response had been “was a full scale disaster, with thousands dying, and nothing meaningful done to fix the testing problem, until now.” And again on Sunday he tweeted, “The USA was never set up for this, just look at the catastrophe of the H1N1 Swine Flu (Biden in charge, 17,000 people lost, very late response time).” It’s become a talking point for his supporters online and off.

Set aside, for the moment, the question of the truth of these claims. The real question for Trump, who presents himself as a hard-charging business executive, is this: Did we hire you to sit around and kvetch on Twitter about the mistakes of your predecessor, or did we hire you to fix them?