Pirola, or BA.2.86, is the third most prevalent Covid strain in the U.S

 Pirola, or BA.2.86, is the third most prevalent Covid strain in the U.S., and although there may be concerns the new monovalent vaccines—which protect against the XBB lineage that Pirola isn’t a part of—don’t offer protection against Pirola and its subvariants, drugmakers and the CDC are sure the vaccines offer defense.