Measles, also known as rubeola, is a viral infection caused by the measles virus. It is highly contagious and can spread easily from one person to another through tiny droplets that are released into the air when an infected person coughs or sneezes. These droplets can be inhaled by someone nearby and lead to infection.

The symptoms of measles typically start appearing about 10 to 14 days after exposure to the virus. They include high fever, cough, runny nose, sore throat, and red eyes (conjunctivitis). A few days after these initial symptoms, a red, blotchy rash usually develops, starting from the face and spreading to the rest of the body.

Measles can make a person feel very sick and weak, and it may take a few weeks to fully recover. In some cases, it can lead to serious complications such as pneumonia, ear infections, and even brain inflammation (encephalitis).

The best way to protect against measles is through vaccination. The measles vaccine is usually given as part of a combination vaccine called the MMR vaccine, which protects against measles, mumps, and rubella. Getting vaccinated not only helps protect yourself but also helps prevent the spread of measles in the community.