grandmac Certain anti-vaccination lobbyists do make sensational claims about side effects. I don't think there have been "many occurrences of serious side effects" of this prophylactic, in fact it seem there have been hardly any. The Center for Disease Control and Prevention has this compparison of those who took the vaccine and a control group who took the placebo:-
"Systemic clinical adverse events were reported by a similar proportion of vaccine and control/placebo groups among both females and males. Headache was most common, reported by 28.2% of females who received HPV4 and 28.4% of those who received AAHS or saline placebo; among males, 12.3% of those who received HPV4 and 11.2% of those who received AAHS or saline placebo reported headache. Overall, 4.0%–4.9% of females and 2.8%–3.0% of males who received HPV4 reported a temperature at or greater than 100°F (≥38°C) after the first, second, or third dose. The proportions of persons reporting a serious adverse event were similar in the vaccine and placebo groups, as were the types of serious adverse event reported. Vaccine-related serious adverse events occurred in less than 0.1% [one in a thousand] of persons. Across all clinical studies (29,323 participants), during the course of the trials, 21 deaths (0.1%) occurred among persons in HPV4 groups and 19 (0.1%) among persons in the control or placebo groups*. NONE of the deaths was considered to be vaccine related."
"Information was collected on new medical conditions that occurred during follow-up of up to 4 years for females and 3 years for males. Overall, among females aged 9–26 years, 2.3% in the HPV4 group and 2.3% in the AAHS control or placebo groups had conditions potentially indicative of autoimmune disorders. Among males aged 9–26 years, 1.5% in the HPV4 group and 1.5% in the AAHS control or placebo groups had conditions potentially indicative of autoimmune disorders. No statistically significant differences were found between vaccine and AAHS control/placebo recipients for the incidence of the conditions "
However, "Essentially all cervical cancers are attributable to high-risk HPV types , and approximately 70% of cervical cancer cases worldwide are caused by types 16 and 18 . In addition to cervical cancer, HPV infection also is the cause of some other anogenital cancers such as cancer of the vulva, vagina, penis, and anus, as well as cancer of the oropharynx " so the risks of NOT being vaccinated are proved and very great.