Genital warts are a common sexually transmitted infection (STI). They are caused by a virus called Human Papilloma Virus (HPV). Genital warts are not cancer and don’t cause cancer. They’re caused by a different strain of HPV. Go to Website: HPV vaccination is offered to every person aged 11 to 13. The vaccine can protect against cervical cancer also protects against genital warts. See also STIs, HPV vaccination