> It's not a matter of "a bit inconsistent". There is no definition of "long covid". Literally anyone can claim they have it and not be wrong.
Individual studies tend to look at different things, but most of the relevant studies give a particular definition. It generally involves symptoms 3,6, or 8 months after an acute infection, and some studies further limit the definition to a particular set of symptoms. Most control for the occurrence of those symptoms in the general population too.
> No, there isn't, and "t-cell exhaustion" is not a thing. It's a phrase made up by pop scientists.
Individual studies tend to look at different things, but most of the relevant studies give a particular definition. It generally involves symptoms 3,6, or 8 months after an acute infection, and some studies further limit the definition to a particular set of symptoms. Most control for the occurrence of those symptoms in the general population too.
> No, there isn't, and "t-cell exhaustion" is not a thing. It's a phrase made up by pop scientists.
https://www.nature.com/articles/s41577-019-0221-9
https://www.pennmedicine.org/news/news-releases/2021/july/pe...
https://pubmed.ncbi.nlm.nih.gov/34288064/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7389156/
https://www.nature.com/articles/s41423-021-00750-4