"Immunizing boys and girls before they become sexually active, experts say, is the most effective way to prevent the spread of the human papilloma virus, or HPV, associated with genital warts and cancer.
U.S. government advisory committee this October recommended that males between the ages of 11 and 21 be vaccinated against the human papilloma virus, believed responsible for thousands of new cancer cases in men and women each year.
The Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices further explained that the vaccine series can begin as early as age 9."