evidence: Around 14 types of HPV are considered high risk for cervical cancer. Two of these types (HPV 16 and HPV 18) cause about 70 out of 100 (70%) of all cervical cancer cases. [...] There are now vaccines to prevent HPV infection. All boys and girls aged 12 or 13 in the UK are routinely offered the HPV vaccine at school. These vaccines protect against the types of HPV that are most likely to cause cervical cancer. But they don't protect against all types. So, you still need to take part in cervical screening, even if you have had the HPV vaccine. [...] The risk of cervical cancer may be increased in women who have a sexually transmitted infection (STI) alongside HPV.