However, that's just a chance, and it's not certain to happen, it's just the thing that's our greatest source of risk, as far as I can tell.
I think the other big worry is that the US government would *normally* lead the way in terms of coping with the disease, but right now that's unlikely to happen due to Trump appointing RFK Jr, a known anti-vaccer who would oppose a nationwide rollout of protective options, at least initially.