1,220
Participants
Start Date
December 31, 2020
Primary Completion Date
December 31, 2022
Study Completion Date
May 31, 2028
Gardasil-9
administration by intramuscular injection of the 9-valent HPV vaccine according to a 3-dose vaccination schedule (0, 2, 6 months).
Placebo
administration by intramuscular injection of the placebo according to vaccination schedule of the 9-valent HPV vaccine (0, 2, 6 months)
Alessandro Ghelardi
OTHER