Vitamin A, at any dose, does not protect against measles and no parent should give to their child vitamin A in hopes of preventing measles. Vitamin A is a micronutrient, meaning very small amounts are all we need to stay healthy and we get those through a healthy diet and in recommended doses of over-the-counter multivitamin supplements. Larger doses of vitamin A given over prolonged periods are very dangerous and can lead to vomiting, blurry vision, headaches, and, when more severe, liver damage and coma.

It is recommended, that under a doctor's supervision, kids infected with measles be given vitamin A once a day for two days to reduce the severity of the illness. But that is a small amount in a medical setting. The only way to prevent measles is to get your child vaccinated with the MMR vaccine. Talk to your pediatrician with questions and learn more: https://bit.ly/4hKbZNK