Global Measles Cases Soar, Reaching 10.3 Million in 2023
A concerning surge in measles cases has been reported worldwide, with an estimated 10.3 million people infected in 2023 – a dramatic increase from the 9 million cases recorded in 2022, according to data released by the World Health Association (WHO) and the U.S. Centers for Disease Control and Prevention (CDC). This marks the highest number of measles cases seen in nearly a decade, reversing years of progress toward global elimination.
The resurgence is especially alarming as measles is highly contagious and can lead to severe complications, including pneumonia, encephalitis, and even death, especially in young children. Widespread vaccination remains the most effective way to prevent measles outbreaks, yet vaccination coverage has declined in many countries, leaving populations vulnerable. The WHO and CDC, alongside partners like the Red Cross, Bill & Melinda Gates Foundation, Gavi, the Vaccine Alliance, United Nations Foundation, and UNICEF, are working to bolster vaccination efforts and prevent further spread.
Measles elimination is defined as the absence of endemic measles virus transmission in a region for more than 12 months. A country is considered to no longer be measles free if the virus returns and sustains continuous transmission for over a year. The recent increase in cases threatens to undo decades of work toward achieving this goal.
For more information on CDC’s global measles vaccination efforts, visit https://www.cdc.gov/global-measles-vaccination. Additional information on WHO’s measles response and support can be found at https://www.who.int/news-room/fact-sheets/detail/measles.
Recent data detailing progress toward measles elimination worldwide from 2000-2023 is available at https://www.cdc.gov/mmwr/volumes/73/wr/mm7345a4.htm?scid=mm7345a4w.
Media inquiries can be directed to WHO at Mediainquiries@who.int and to CDC at Media@cdc.gov.
