Encephalitis, which is swelling of the brain, can also lead to paralysis, seizures, and other issues. open image in gallery A seasonal flu virus that can lead to paralysis and other dangerous ...

1 to 3 in 1,000 people get brain swelling (encephalitis); and 1 in 1,000 people die. Children who are infected with measles typically stay home from school. And since symptoms can emerge over ...