@amyqk Go to this site. https://recover-tlc.org/

or this site https://longcovidjustice.org/long-covid-essentials/

There are so many studies and research. Also, go to Google and type in Google Scholar. Once there, put Long COVID studies or whatever you want to search. There are research articles, however they are sometimes complex. I suggest reading the abstract and then the "findings", "Results" and/or "Discussion" part of the research article.

I can tell you that inflammation is a key factor. I can also tell you that they believe (from a research article I read) that other viruses, such as Epstein Barr Virus (EBV) are reactivated somehow when people like us, have gotten the Sars Covid-19 virus. The issue with a virus is that there is no medication, viruses have to work their way out. Also, with LC, there are so many other health issues that it causes, symptoms that, I believe, mimic other autoimmune illnesses. Fatigue, Brain Fog, Post-exertion malaise, weird rashes, GI issues, breathing issues, sometimes people are getting other health problems, some worse than others. Hang in there. Read as you are your own best advocate!