Gadasil There are three HPV vaccines available ; Cervarix, protects against two types of HPV - 16 and 18. Gardasil, protects against four types of HPV – 6, 11, 16, and 18 Gardasil 9, protects against nine types of HPV - 6, 11, 16, 18, 31, 33, 45, 52 and 58 All of the vaccines protect against the two most common high-risk types of the virus: 16 and 18. These two strains are linked to over 70% of cervical cancers and 63% of penile cancers as well as most mouth, anus and throat cancers. In addition to types 16 and 18, Gardasil protects against types 6 and 11, responsible for around 90% of genital warts. Gardasil 9 protects against a further four types of HPV: 31, 33, 45, and 52 which cause an additional 15% of cervical cancers. The impact of the HPV vaccine In clinical trials, the HPV vaccine was over 99% effective at preventing pre-cancer caused by HPV types 16 or 18 in young women, which are linked to 70% of cervical cancers. It is estimated that by 2058, after 50 years of this vaccination programme, 64,000 cervical cancers and 50,000 other cancers will have been prevented.