Dr. Tom Frieden (left), director of the Centers for Disease Control and Prevention, testifies about Zika virus with Dr. Anthony Fauci (center), director of the National Institute of Allergy and Infectious Diseases, and Dr. Ariel Pablos-Mendez, assistant administrator of the U.S. Agency for International Development's Bureau for Global Health, on Capitol Hill on Feb. 10. Nicholas Kamm/AFP/Getty Images hide caption

Prince George's County District Court in Maryland has used a mental health court as an alternative to traditional criminal proceedings. Sallicio/Wikimedia hide caption

"The Block is like living," outreach worker Nathan Fields says. "These relationships, you've got to keep them flourishing." Meredith Rizzo/NPR hide caption

A man smoked an e-cigarette. iStockphoto hide caption

Tablets of Lipitor and its generic equivalent, atorvastatin, are among the drugs commonly prescribed to prevent heart attacks and strokes among people at risk. Paul J. Richards/AFP/Getty Images hide caption

If you're at high risk of hepatitis B infection, your insurance company should pay for testing for the virus without passing any of the cost on to you. London School of Hygiene and Tropical Medicine/Science Source hide caption

Truvada can dramatically reduce the risk of HIV infection when taken as a preventative medicine — if taken every day. Studies are underway to determine if young people are likely to take the pill consistently. Justin Sullivan/Getty Images hide caption

Dr. Leana Wen became Baltimore's health commissioner on Thursday. Mark Dennis/City of Baltimore hide caption

To keep kidney stones at bay, drink plenty of cool, clear water. iStockphoto hide caption

A celebrity's efforts to educate the public about health risk may have very limited effects. Evan Agostini/AP hide caption

There has been more progress in lowering deaths from heart attacks and strokes among people who qualify for Medicare than those who are younger. CDC hide caption