Sorry kids, another shot!

Physicians found a new vaccine on their shelves this past summer to fight the human papilloma virus (HPV), which causes cervical cancer and genital warts. Merck's Gardasil and GlaxoSmithKline's Cervarix target four strains of HPV, one of the most common sexually transmitted diseases. The federal Food and Drug Administration approved the Gardasil vaccine for females between ages 9 and 26. Approval for Cervarix is pending.

According to the Centers for Disease Control and Prevention (CDC), HPV infects an estimated 20 million people, with 6.2 million new infections each year. At least 3,700 women died from cervical cancer last year, according to the American Cancer Society. The new vaccine could prevent most cervical cancer deaths in the future.

The CDC recommends that the HPV vaccine be administered to all 11- or 12-year-old girls. It also recommends the HPV vaccine be covered by the federal Vaccines for Children Program, which covers Medicaid recipients, Alaska-Native and American Indians, and...