[notadoc]

From a medical standpoint, HSV and HPV are largely cosmetic and very low priority. HPV is/was perhaps a slightly higher priority because it can rarely lead to certain cancers, but the vaccine Gardasil aims at those types of HPV.

[DrScump]

Only four strains, not all strains. Others kill up to nine different strains, but that's still not all potentially carcinogenic strains.