The complications resulting from encephalitis depend on several factors, including age, the cause of the infection, the severity of the initial illness and the time from disease onset to treatment.

In most cases, people with relatively mild illness recover within a few weeks with no long-term complications.

Complications of severe illness

Injury to the brain from inflammation can result in a number of problems. The most severe cases can result in:

  • Respiratory arrest
  • Coma
  • Death

Other complications — varying greatly in severity — may persist for many months or be permanent:

  • Fatigue
  • Weakness
  • Mood disorders
  • Personality changes
  • Memory problems
  • Intellectual disabilities
  • Lack of muscle coordination
  • Paralysis
  • Hearing or vision defects
  • Speech impairments
May. 05, 2011