2 Doses of HPV Vaccine Effective for Younger Teens
New global research confirms that two doses of the vaccine for HPV, rather than three, can protect younger teens against the sexually transmitted virus.

Based on this study and others, U.S. government health officials revised their guidelines last month to recommend a two-dose regimen for teens younger than 15. Prior to that revised guideline, three doses were recommended for adolescents and young adults up through 26 years of age....