PDF download is not available for Arabic and Urdu languages at this time. Please use the browser print function instead

Measles is an infection caused by a highly contagious virus. Learn the symptoms and causes of measles and how it can be prevented.

Key points

  • Measles is an infection caused by a virus. It is very contagious and has no specific antiviral treatment.
  • Usually, measles causes fever, runny nose, cough, conjunctivitis (red and watery eyes) and a rash.
  • Complication rates are highest among young children and include pneumonia, encephalitis (brain swelling or infection), blindness and death.
  • Measles can be prevented with immunization.
  • If you think your child has measles and needs to be seen, call your health-care provider, clinic or emergency department before arriving. Precautions can then be made to prevent the spread of the infection to others.
Last updated: June 28th 2023