what causes the disease measles
Causes. The cause of measles is a virus that replicates in the nose and throat of an infected child or adult. When someone with measles coughs, sneezes or talks, infected droplets spray into the air, where other people can inhale them.auses. The cause of measles is a virus that replicates in the nose and throat of an infected child or adult. When someone with measles coughs, sneezes or talks, infected droplets spray into the air, where other people can inhale them.