Human papillomavirus (HPV) is a common sexually-transmitted virus which causes infections
that usually last only a few months, but sometimes can last a long time and cause cancers of
the cervix, vagina, vulva, anus or oropharynx over many years among adults. This phase IIA
trial studies how well does the nonavalent HPV vaccine (which can prevent nine different
types of HPV) work when given in an alternative dosing schedule to heathy young research
participants.