This randomized, active-comparator controlled, open-label study will enroll total of approximately 1025 girls aged 9 to 14 years, in one country in Africa (Ghana) and one country in South/Southeast Asia (Bangladesh). Subjects will be randomized 1:1:1:1:1 to receive Cecolin® at 0 and 6 months, 0 and 12 months, or 0 and 24 months, Gardasil® at 0 and 6 months, or Gardasil® at 0 months and Cecolin® at 24 months. For each arm, blood will be collected for immunologic testing at baseline and one month following second dose. Additional blood collections will occur immediately prior to the administration of the second dose, as well as at additional later time points, for immunobridging to other published and ongoing trials. The study also aims to evaluate the performance of a mixed arm (group 5) of Gardasil® followed by Cecolin® and collect data on effects of interchangeability.~Girls of target age will be identified, and their parents contacted to attend an informational session for individual discussion, informed consent, assent and randomization.~The study will be conducted by the research groups in icddr,b in Bangladesh and Malaria Research Center (MRC) in Ghana.
This planned randomized controlled trial will evaluate a bivalent HPV vaccine, Cecolin®, in alternate 2-dose regimens, compared to an established HPV vaccine. Gardasil® used as the comparator vaccine, as this vaccine is most widely used in low- and low-middle income countries.