Having polio made me a firm believer in immunizations." Kirn Vintage Stock / Corbis via Getty Images "I knew a lot of kids who had measles and a few kids who lost siblings to measles. I was given ...

File photo: Artist's impression of measles spots forming the shape of the United States. wildpixel/iStock / Getty Images Plus In the year 2000, the World Health Organization (WHO) declared that ...

A sign points patients to measles vaccinations at a health facility in Lubbock, Texas, on April 9. (Brandon Bell/Getty Images) You’re reading The Checkup With Dr. Wen, a newsletter on how to ...