• No vaccination. People who have not received the vaccine for measles are much more likely to develop the disease.
  • International travel. Unvaccinated people traveling to developing countries, where measles is more common, are at higher risk of catching the disease.
  • Vitamin A deficiency. People who don't have enough vitamin A in their diets are more likely to contract measles and to have more-severe symptoms.
Jun. 01, 2011