Measles can cause complications like pneumonia, brain swelling, long-term hearing loss and death — as is the case in the current Texas outbreak. In the decade before the measles vaccine, the CDC estimates 3 to 4 million people were infected and 400 to 400 people died from the virus every year in the United States.

A child has died of measles in Texas, officials said — the first death from the highly contagious disease the United States has seen in a decade. The school-age child was not vaccinated, according to the Texas Department of State Health Services.