The bacterium that causes syphilis is spread through sexual contact. It's easily cured with antibiotics, but can be hard to diagnose. CDC/Phanie/Science Source hide caption

toggle caption CDC/Phanie/Science Source

A Los Angeles County Department of Public Health worker shows condoms for weekly distribution to inmates in the Men's Central Jail. George Lavender hide caption

toggle caption George Lavender

Beware of the big guys: Red snappers from tropical waters sometimes accumulate high levels of the toxin that causes ciguatera. Go for the smaller fish to avoid it. Kamel Adjenef/iStockphoto hide caption

toggle caption Kamel Adjenef/iStockphoto

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

toggle caption Joe Raedle/Getty Images

In the U.S., doctors no longer have the option of treating gonorrhea with a pill. Instead, they are advised to use an injectable antibiotic, which is still effective against the bacteria. hide caption

toggle caption

NPR thanks our sponsors

Become an NPR sponsor