Baseline values for HPV type prevalence in cases of cervical cancer are important because these can reveal whether the types in cancers are changing as more of the population is vaccinated and whether new vaccines are targeting the correct types. A meta-analysis looked at papers published between 1990 and 2010 on more than 30,000 cervical cancer cases. 4 The most common HPV types found, in order of decreasing prevalence, were HPV 16 (57 percent), 18 (16 percent), 58 ( percent), 33 ( percent), 45 ( percent), 31, 52, and 35. In addition, more specimens than in previous studies showed infection with.
