Herpes Viruses and Senile Dementia: First Population Evidence for a Causal Link. When Taiwanese authors looked at subjects who suffered severe herpes infection and were treated aggressively with antivirals, the relative risk of dementia was reduced by a factor of 10.

See the source article by following the link below:
Herpes Viruses and Senile Dementia: First Population Evidence for a Causal Link. When Taiwanese authors looked at subjects who suffered severe herpes infection and were treated aggressively with antivirals, the relative risk of dementia was reduced by a factor of 10.