I don't see that as a get out of jail card for any other than his base. The Democrats will simply argue that if he had done more, better, sooner, the death toll would have been lower than it actually turns out to be.
They could argue that ... if they actually were calling for it back then.
However at the time, every single person on both sides downplayed this, including all of the media and Dems. Then, to add to that, the one thing every health experts says saved lives and gave us an advantage to not become like other countries was closing off all travel to China. Biden, and the rest of the Dems, all called this unnecessary and xenophobic, which is a major liability for them if they criticize Trump over his response.
So they really do not have any legs to stand on here, which is why Joe Biden on CNN the other day insisted that Trump was doing a good job. Yes, he actually said this of Trump. On top of this, it is now coming out that the Obama administration was warned about a ventilator shortage, which just adds to Biden's liability in this argument.
(The only one who could partially criticize Trump on this is Cuomo. He has some bad public moments as well on this, but Biden really painted himself into a corner here.)
Now, do I feel Trump could have done better? Yes. He made a good move closing off travel to China, but then wasted February. But this was due to the overall apathy that the entirety of the
country World had on this. De Blasio told New Yorkers to not worry and to continue their lives as normal (was actually question by Jake Tapper over the weekend) and of course their are others. But going back to my original point ...
It is obvious some in the media are trying to put Trump into a Catch-22 by constantly talking about the worse possible predictions, while simply ignoring more plausible others. (Dr. Deborah Birx admonished the media recently for just this.) If Trump ignores them, then he can be criticized for not taking the virus seriously and costing lives, which can be used against him in November. However, if he does shut down the country, the economy will be destroyed, which can be used against him in November. However, the caveat here is that the media constantly used that 2.2M figure, which gives Trump an out politically. So long as the death toll does not approach that, the media have given Trump a way to declare victory politically.
PS. I think the real responsibility goes to both China and WHO. It is now coming to light China may have known about this as far back as November and told no one. They were more concerned with their own reputation then the Chinese people and the world. Then, the WHO has shown itself to become a shrill for China, and simply republished all of the Chinese propaganda throughout January without sending a single investigator to Wuhan. Even now, WHO continues to push this propaganda, has gone to great lengths to try and make sure the virus is not referred to as Chinese, and, even recently, refused to even discuss Taiwan's exemplary response on containing the virus merely due to political reasons. I think our relations with both need to be seriously questioned and reviewed after all of this.