The United States is experiencing a rise in measles, the most contagious virus in the world. Many of us have questions: Is my child protected? Do I need another vaccine? What about taking vitamin A?  Infectious disease experts worry that the Trump administration’s handling of the outbreak centered in West Texas is creating confusion and hindering an effective response. Today on “Post Reports,” host Colby Itkowitz speaks with Lena Sun, a national reporter focused on public health and infectious diseases, about what to know about the widening measles outbreak and how families can protect themselves.  Read more:Trump has faced measles before. The difference this time is RFK Jr.RFK Jr.’s focus on vitamin A for measles worries health expertsShould you get a measles booster? Here’s what to know.Five people who survived measles recount the disease’s horrorsToday’s show was produced by Elana Gordon. It was edited by Maggie Penman and mixed by Sean Carter. Thanks to Lenny Bernstein. Listen to our previous episode ”Inside Texas’s Growing Measles Outbreak.”Subscribe to The Washington Post here.