Measles Elimination

The United States has maintained measles elimination status for almost 20 years.

While we expect importations of measles cases into the United States to continue, the risk for measles for the majority of the population would still remain low. That is because most people in the United States are vaccinated against measles.

The World Health Organization (WHO) definespdf iconexternal icon measles elimination as “the absence of endemic measles virus transmission in a defined geographical area (e.g. region or country) for at least 12 months in the presence of a surveillance system that has been verified to be performing well.” In 2000, measles was declared eliminated from the United States.  That means the disease is no longer constantly present in this country. However, travelers continue to bring measles into the United States, and it can sometimes spread and cause outbreaks among people who are not vaccinated. If a measles outbreak continues for a year or more, the United States could lose its measles elimination status.

The U.S. will continue to detect and respond to measles cases

Measles outbreaks continue to occur in countries around the world so there is always a risk of measles importations into the U.S.

  • When measles is imported into a community with a highly vaccinated population, outbreaks either don’t happen or are usually small.
Eliminating measles in the U.S. was a historic achievement

Achieving measles elimination status and maintaining it for 19 years is a historic public health achievement.

The measles vaccine protects you and your community

Children should be vaccinated on schedule with MMR vaccine.

Illustration of a family

  • Recommendations for infants traveling internationally have not changed. Infants (6 through 11 months old) should receive 1 dose of measles-mumps-rubella (MMR) vaccine before travel. This dose does not count as the first dose in the routine childhood vaccination series.

During an outbreak of measles, public health authorities might recommend an early dose of MMR for infants 6—11 months old who live in, or are traveling to, communities in the U.S. where there is ongoing, community-wide transmission of measles. They may also recommend a second dose of MMR for children 1—4 years of age, and/or adults who previously only received one dose, depending on the age of the affected population. Check the local health department’s website for specific recommendations.

Page last reviewed: November 5, 2020