<qa>  What is the effect of different dose schedules and type of HPV vaccine on a rangeThe effect of different dose schedules and type of HPV vaccine on a range of immune responses will be measured up to 36 months after the first dose. The protocol will be harmonised, and laboratory procedures and immunological endpoints will be cross-validated, with those of a large HPV vaccine dose-reduction efficacy trial being planned by the NIH in Costa Rica to examine the protective effect of the same vaccines given as 1 or 2 doses.This trial will allow the examination of quality and durability of antibody responses, and safety and cost-effectiveness of reduced dose schedules compared to the originally recommended 3 dose schedule in a population with high burden of malaria and other infections that may affect vaccine immune responses. 