What causes long Covid? Scientists are zeroing in on the answer.

[Jilly_in_VA]

4. That may be just a completely depleted immune system

I dunno. We haven't talked about that, having had more pressing problems recently with our other brother, who's had a severe autoimmune disorder of another kind, autoimmune limbic encephalitis. We thought we'd lost him, or at least the person he was, but amazingly, he's coming back. Still has some memory problems and occasionally searches for a word, but we are just wowed by his recovery. So discussions of other types of autoimmune disease, in which we both have a great interest, have kind of taken a back seat recently.