The HPV vaccine is one of the most impactful in history – here's new data on its efficacy
Two doses: 98.5%
One dose: 97.0%
(This is for the nonavalent HPV Vaccine, Gardasil-9, against the main carcinogenic HPV strains, 16 and 18)
So in this population (girls aged 12 to 16 years) one dose is just as good as two
Less than 30% of adolescent girls have had the vaccine globally: using a one-dose schedule could massively increase access