Mycotoxins.
Spores are everywhere. Once the vax has destroyed your immune system, mold toxins start tearing shit up. Might even be worse for athletes as they have higher levels of galactin-3, which feed and assist the toxins in traveling around the body.
https://pubmed.ncbi.nlm.nih.gov/23723328/
https://pubmed.ncbi.nlm.nih.gov/32750085/