What is measles?

Measles is a highly contagious and potentially serious illness caused by a virus. Measles is spread through the air after a person with measles coughs or sneezes. The virus can linger in the air for up to two hours after someone who is infectious has left.

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1. What places have been identified as exposure sites?
2. What is measles?
3. What are the symptoms of measles?
4. How contagious is measles?
5. What should I do if I think I have the measles?
6. How serious is measles?
7. How can I prevent measles?
8. How many doses of the measles vaccine do I need?
9. How common is measles?
10. How is measles treated?