Source: Centers for Disease Control and Prevention — Content from the Centers for Disease Control and Prevention (public domain).
Measles is a highly contagious virus. Two doses of the MMR vaccine provide the best protection.
May 29, 2024
Find the latest numbers of confirmed U.S. measles cases. CDC updates this page weekly.
May 16, 2025
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.
Apr. 8, 2025
Learn about clinical diagnosing and treating measles cases.
July 15, 2024
Get key measles resources including case definitions and outbreak and response procedures.
Use this toolkit to help you communicate, prepare, and respond to measles cases and outbreaks.
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.