Measles is a highly contagious virus. Two doses of the MMR vaccine provide the best protection.
Find the latest numbers of confirmed U.S. measles cases. CDC updates this page weekly.
First signs of measles are fever, cough, & runny nose 7–14 days after infection.
Prepare for international travel with the measles, mumps, and rubella (MMR) vaccine.
Learn about measles vaccine basics, who should get it, when to get it, and why it's important.
Download, print, and share free measles resources.
For Professionals
Learn what to do if you suspect your patient has measles or was exposed to measles.
Learn about clinical diagnosing and treating measles cases.
Get key measles resources including case definitions and outbreak and response procedures.
Detection of measles RNA by RT-PCR can provide laboratory confirmation of infection.
Find routine MMR information, evidence of immunity, other considerations for measles vaccine.