The highly contagious disease measles is caused by a virus. It can spread swiftly when an infected person breathes, coughs, or sneezes. Severe illness, complications, and even death may result from it.

Measles symptoms typically appear 10–14 days after viral exposure. Having a noticeable rash is the most obvious symptom.

Measles is one of the most contagious illnesses in the world. It is spread by contact with infected nasal or throat secretions (coughing or sneezing) or by breathing in air that has been inhaled by an infected person.

The benefit of protection against rubella, the most common vaccine-preventable infection that can infect unborn children, is increased when vaccinations are combined.