Complications from measles include ear infection and, in rare cases, pneumonia, strep throat, diarrhea, and encephalitis. In extremely rare cases, encephalitis can result in permanent brain damage and death.

If a pregnant woman gets measles, she has a greater chance of miscarrying her baby, delivering her baby prematurely, or delivering a stillborn baby. But measles infection does not cause birth defects.

Infants, older adults, people who have impaired immune systems, and people who have poor nutrition are at a higher risk for complications.