The chlamydia bacteria can cause pelvic inflammatory disease and fertility problems, but women often don't know they're infected. David M. Phillips/Science Source hide caption

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University of Miami pediatrician Judith Schaechter gives a girl an HPV vaccination in 2011. Joe Raedle/Getty Images hide caption

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Social worker Shannon Coyne and her husband decided against circumcision for their son, now 11 months old. The nation's most influential pediatricians group says the health benefits of circumcision in newborn boys outweigh any risks and that insurance companies should pay for it. Matt Rourke/AP hide caption

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Health officials say they're worried that one day there will be no more antibiotics left to treat gonorrhea. hide caption

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