Covid and autoimmune disease

[SueDonim]

I was reading an article recently about a link found between the black plague and autoimmune diseases we face today such as crohns disease.
Apparently the gene pool that survived had more active immune systems and the theory is that its over stimulated from the immune response to the plague.

That's interesting and reminded me of the fact that with the first SARS virus in 2003 one of the reasons it was so dangerous was that it turned people's own immune systems against them and killed the healthiest individuals rather than those who were old and inform.

I looked up the relationship between plague and autoimmunity and found there are a number of recent articles including this one:
Yersinia pestis and plague in the 21st century: learning from a distant past (https://portlandpress.com/biochemist/art...st-century). For me the key sentence was " having a very active immune system which might turn itself against us may represent the price that human populations paid for surviving plague".