Overview of epidemiologic structure of multi-HPV type model. HPV infection may progress to either genital warts or cervical disease, with regression possible for HPV infection, CIN grades 1–3 and genital warts. Only cervical cancer confers an added risk of mortality, as depicted in the figure. However, in the full model (not shown for simplicity) all individuals face an underlying age and sex-specific mortality rate due to non-cervical cancer-related causes. CIN = Cervical Intraepithelial Neoplasia; HPV = Human Papillomavirus.
Insinga et al. BMC Infectious Diseases 2009 9:119 doi:10.1186/1471-2334-9-119