Ivermectin, Hydrxychloroquinine, or some other quinine product (check out angostura bitters, for example) or wormwood.

I am not a doctor, but Pfizer has parasites in it: https://www.thelibertybeacon.com/dr-robert-young-finds-graphene-oxide-in-all-four-vaccines-and-other-disturbing-ingredients/ Furthermore, a virus is classified as a parasite: https://pubmed.ncbi.nlm.nih.gov/21413309/

Ivermectin