> hasn't given us any indication of similar activity. but we know so very little that we can't take the risk

There's little reason to believe it's significantly different to any other Coronavirus. Speculating that's it's suddenly going to be aids++ is pointless scaremongering.

The main* reason it was a "big deal" was the lack of common immunity thus leading to potentially rapid spread. Deaths in the vulnerable from the side effects of this kind of thing are perfectly normal and perfectly well understood and there is very little treatment