Thanks for placing your query here.
I can appreciate your concerns about your cousin.
means there is infection & inflammation of brain caused by virus.
There are several types of viruses which can cause encephalitis & only herpes simplex
virus is treatable by acyclovir
For all other viruses there is symptomatic treatment only.
Unfortunately a significant proportion of children affected by viral encephalitis can have neurological sequel. This mainly depends on how much brain damage
For futher explaination I need to know results of MRI
,EEG,CSF, CSF viral PCR etc.
Hope I have answered your query.
If you have any further questions I will be happy to help.
Wish him speedy recovery.