encephalitis symptoms in adults
The ability of HSV-1 to induce apoptosis (programmed cell death, or âcellular suicideâ) in neuronal cells, a property not shared by HSV-2, might explain why the former causes virtually all cases of herpes simplex encephalitis in immunocompetent older children and adults.
1 VEE infection in humans is much less severe than that of WEE and EEE. 2  While adults tend to develop a flu-like illness, children tend to develop overt encephalitis. 3  Deaths are rare in humans but are common in horses. 4  There is an effective vaccine for horses but none for humans.