The updated guidance advises that all Americans 1 year and older should have two doses of the MMR vaccine and infants 6 to 11 months old should receive one early dose before travel. More than 1,000 measles cases have been reported in the United States so far this year, CDC data show.

The Centers for Disease Control and Prevention is warning people about the risks of contracting measles while traveling.

In response to a significant resurgence of measles across the United States, the Centers for Disease Control and Prevention (CDC) has escalated its public health advisory. The warning focuses on air travel,