Martha and Alvaro Galvis used to travel from New Hampshire to Boston to watch the marathon every year. Both were hurt in the bombing two years ago. Jesse Costa/WBUR hide caption

itoggle caption Jesse Costa/WBUR

Anne Koller closes her eyes as an oncology nurse attaches a line for chemotherapy to a port in her chest. Koller typically spends three to six hours getting each treatment. Sarah Jane Tribble/WCPN hide caption

itoggle caption Sarah Jane Tribble/WCPN

This spiral CT image of the chest shows a large malignant mass (purple) in one lung. A conventional chest X-ray could have missed this tumor, radiologists say. Medical Body Scans/Science Source hide caption

itoggle caption Medical Body Scans/Science Source

Some researchers recommend starting mammogram screening at age 40, while others say age 50. Some doctors think screening should be based on a woman's overall risk for breast cancer, not just her age. Hero Images/Corbis hide caption

itoggle caption Hero Images/Corbis

A kit with naloxone, also known by its brand name Narcan, is displayed at the South Jersey AIDS Alliance in Atlantic City. Naloxone counters an overdose with heroin or certain prescription painkillers by blocking the receptors these opioids bind to in the brain. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

Dr. Raj Mangrulkar and medical student Jesse Burk-Rafel at the University of Michigan Medical School. Good communication skills, teamwork and adaptability will help doctors thrive through swift changes in medical science, Mangrulkar says. Leisa Thompson/Courtesy of University of Michigan Medical School hide caption

itoggle caption Leisa Thompson/Courtesy of University of Michigan Medical School

Houston firefighters learn to use a video chat program that will let them consult with an emergency medicine doctor while responding to 911 calls. Courtesy of Houston Fire Department hide caption

itoggle caption Courtesy of Houston Fire Department

Depending on the amount taken in subsidies, or changes in reported income and family status, some Obamacare policyholders this year will get a bigger refund than expected and others will owe more in taxes. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

NYU medical student Sara Stream (left) examines dancer Jazlyn Caing, who visited the clinic for low-grade orthopedic and respiratory problems. Fred Mogul/WNYC hide caption

itoggle caption Fred Mogul/WNYC

Michaela leans on her mother, Dee, while talking to Dr. Karin Selva about puberty suppression. Kristian Foden-Vencil/Oregon Public Broadcasting hide caption

itoggle caption Kristian Foden-Vencil/Oregon Public Broadcasting

Crystal Groah holds four-month-old son Brently while Dr. Rob Marsh examines him. He and his twin sister Savannah were premature at birth, but with care from Marsh both are doing well. Sandy Hausman/WVTF hide caption

itoggle caption Sandy Hausman/WVTF

A big crowd turned out for the March of Dimes walkathon in Gainesville, Fla., in early March. But overall, the March of Dimes' March for Babies raised $3.5 million less in 2014 than it did the year before. Elizabeth Hamilton/Gainesville Sun/Landov hide caption

itoggle caption Elizabeth Hamilton/Gainesville Sun/Landov