Measles is a highly contagious virus. Two doses of the MMR vaccine provide the best protection.
Find the latest numbers of confirmed measles cases in the U.S. CDC updates this page weekly.
Prepare for international travel with the measles, mumps, and rubella (MMR) vaccine.
Measles Symptoms and Complications
Measles symptoms including high fever, cough, and runny nose appear 7–14 days after infection.
For Professionals
Learn about clinical diagnosing and treating measles cases.
For Public Health Professionals
Get key measles resources including case definitions and outbreak and response procedures.
Laboratory Testing for Measles
Detection of measles RNA by RT-PCR can provide laboratory confirmation of infection.