Florida saw its first documented case of measles of the year as West Texas grapples with a large outbreak. A high school student in the Miami area has been diagnosed with the disease. The school is working with local health officials to offer free MMR vaccines to unvaccinated students with parental consent.

Here’s what to know about the current measles outbreak, how common the measles is in the U.S., how it spreads and what the symptoms and treatment are.

Here’s what to know about the current measles outbreak, how common the measles is in the U.S., how it spreads and what the symptoms and treatment are.