Bedoeling was na te gaan of de serotypes aanwezig in de HPV-vaccins progressief vervangen worden door andere serotypes.
Meer info: Z. Yang, J. Cuzick, W. Hunt et al. Concurrence of Multiple Human Papillomavirus Infections in a Large US Population-based Cohort. Am J Epidemiol. 2014; 180 (11): 1066–1075. doi: 10.1093/aje/kwu267