MMR can also cause encephalitis

One of the more serious symptoms of contracting measles is a condition known as encephalitis, which in layman’s terms is swelling of the brain. Apparently, 1 out of 1,000 people who develop measles are at risk for encephalitis. What people should also be aware of is that the MMR (measles, mumps, rubella) vaccine can also cause encephalitis. Surprise!