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What happens if a person contracts measles?

A person who becomes infected with the virus that causes measles is likely to develop a high fever, cough, and runny nose and have red, watery eyes. These symptoms are followed by a characteristic rash that spreads from the face downward. Symptoms appear 7–14 days after exposure and can lead to severe complications, including pneumonia, encephalitis (brain inflammation), diarrhea, or death, particularly in people who are unvaccinated.