Getting covid and LC last year, and associated vaccines didn't influence my platelet (or other CBC) levels, but my having MGUS (8 years) does decrease them. Covid sickens people, and for some can trigger autoimmune and other diseases/symptoms. What came first? Covid, and/or did it reveal other problems? I have celiac disease because I caught H1N1 flu almost 15 years ago which triggered my HLA-DQ8 haplotype and tied autoimmune response. ResearchGate is a one source for research publications. I'm a retired research scientist (not medicine), but even I get Dr. Google responses from doctors. Under Obama, a law was passed such that all federal govt funded research has to be made available to the public. If one knows what to search for, a lot is being published on covid and other diseases.