Yes respirators and masks, I know, but the previous administration had gone through the same thing on a smaller scale and stockpiles were not replenished possibly because experts said it won't happen again for a while (I am giving the previous administration the benefit of the doubt here.. I don't know why they didn't replace those items).
The point here is, there's not that much that even had all information been available, and masks, and respirators, the world could have done. It's literally a force of nature that humans have a limited ability to deal with instantly.
I am not defending any political or public policy department past or present. I am just stating the obvious. Everything else is 20/20 hindsight aimed at the margins of effectiveness, so why go there ?