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Measles and the MMR vaccine

Measles is an extremely contagious disease that could have major health consequences for those who become infected and are unvaccinated.

While measles can be a mild illness, it has the potential to cause severe complications such as sight loss, hearing loss, pneumonia and meningitis. In extreme circumstances, measles can be fatal.

Recent outbreaks of measles have occurred across the UK, including in Wales, and more outbreaks could occur in future. However, we can slow the spread and protect our children and ourselves with the measles, mumps and rubella (MMR) vaccine.

The simple, two-dose MMR vaccine is extremely effective and safe, and there are gelatine-free options available. They are routinely given at GP practices when children are 12 months old and again at 3 years and 4 months - but it is never too late to catch up. **

Please contact your GP practice nurse directly to book a vaccination appointment. There is no upper age limit.

Please find some useful content below:

** Up to December 31, 2025: The first dose of the MMR vaccine is given at 12-months, and the second dose is given at 3 years and 4 months.  

From January 1, 2026:

  • The first dose of the MMR vaccine continues to be given at 12-months. 
  • A new 18-month appointment is added to the routine schedule. 
  • The second dose of the MMR vaccine is brought forward from 3 years and 4 months to the new 18-month appointment. 

The Complete Routine Immunisation Schedule for Wales is available on our website at: Routine immunisation schedules for Wales 

For Health Professionals, more information on the changes, including a table outlining MMR eligibility, can be found at: Changes to the childhood immunisation schedule - Information for health professionals