世卫组织免疫战略咨询小组专家去年提出了进一步提升疫苗成本效益的建议。 他们呼吁仅注射两剂HPV疫苗，而不是之前认定的三剂。
A recommendation last year by the World Health Organization’s Strategic Advisory Group of Experts on Immunization promises to boost vaccines’ cost-effectiveness further, by calling for just two doses of the HPV vaccine, rather than the three doses previously thought to be required.