People have been working on cancer vaccines for a long time actually, it's just so hard.

- https://www.annualreviews.org/doi/10.1146/annurev-cancerbio-...

- https://www.jimmunol.org/content/200/2/443

- https://science.sciencemag.org/content/359/6382/1355

No need to imagine, HPV infection causes cervical, vulva, vagina, penis, anus, and oropharynx cancer and we have a vaccine for HPV (that is effective against the majority of the strains of HPV that cause cancer)! According to the CDC "almost all cervical cancer can be prevented by HPV vaccination."

Cancer is exactly why we vaccinate against HPV, as it's a huge cause of cervical cancer.

HPV also causes vulva, vagina, penis, anus, and oropharynx cancers as well.

https://www.cdc.gov/cancer/hpv/basic_info/cancers.htm

>In general, HPV is thought to be responsible for more than 90% of anal and cervical cancers, about 70% of vaginal and vulvar cancers, and 60% of penile cancers. Cancers in the back of the throat (oropharynx) traditionally have been caused by tobacco and alcohol, but recent studies1 2 3 show that about 60% to 70% of cancers of the oropharynx may be linked to HPV. Many of these may be caused by a combination of tobacco, alcohol, and HPV.