Our expert says:
I'm sorry to hear that your dad is so sick. Herpes is a kind of virus and encephalitis means infection of the brain. Herpes is a common virus that usually causes cold sores on the mouth/nose and most of us have contact with it from time to time. It spreads by direct contact (touch) so it is not contagious if you visit your dad. Herpes encephalitis can spread from a cold sore in the nose via the sinuses to the brain. It is a serious but very rare disease and if untreated can cause death. These days we luckily have good antiviral medications available that we can use for the infection. I hope he recovers quickly!
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