Helen Down holds her 14-month-old daughter, Amelia, for an MMR shot in Swansea, Wales, April 2013. The vaccination was in response to a measles outbreak. Geoff Caddick/AFP/Getty Images hide caption
Amish show up at a makeshift clinic to get vaccinated against the measles. There's been an outbreak of measles among the Amish in central Ohio. Sarah Jane Tribble/Sarah Jane Tribble hide caption
Measles Outbreak In Ohio Leads Amish To Reconsider Vaccines
90.3 WCPN ideastream
Measles was brought to Ohio's Amish communities by people returning from mission trips to the Philippines. Chuck Crow/The Plain Dealer/Landov hide caption
There today, here tomorrow: A mother holds her child for a measles vaccination in Manila, Philippines, in January. Travelers are bringing measles from the Philippines to the United States. Noel Celis/AFP/Getty Images hide caption
Potent but not perfect: Medical assistant Elissa Ortivez prepares a measles, mumps and rubella vaccine at a clinic in Walsenburg, Colo. John Moore/Getty Images hide caption
This one's virus-free: Matthew Followill, Nathan Followill and Caleb Followill of Kings of Leon performed in Los Angeles in December. Kevin Winter/Getty Images for Radio.com hide caption
A boy waits to get vaccinated at an anti-polio campaign in Moradabad, India. Michaeleen Doucleff/NPR hide caption
The Eagle Mountain Church in Newark, Texas, was linked to at least 21 cases of measles this year, mostly in children. LM Otero/AP hide caption
Luke Tanner, 7, gets vaccinated for measles at a clinic near Swansea, Wales, in April. Wales is at the center of a measles outbreak that has been linked to one death. Geoff Caddick/AFP/Getty Images hide caption