Isn't it pretty well-known that many diseases/disorders are likely from post-viral infection? Howard Bloom who famously had CFS for decades talked about how he had a bad flu that never got better and his long recovery from it. https://medicalerrorinterviews.podbean.com/e/howard-bloom-pa... Michael J Fox who famously has Parkinson's mentioned being sick in his documentary "Still" while filming "Leo and Me" where other…
Viruses can cause organ tissue damages, that's enough for me to believe a virus can cause all sort of "syndromes"
I'm not on the denier side but harass me with fear, threats, and free movement mandates and I will deny that syndromes even exist.