Encephalitis viruses are a group of viruses that cause inflammation in the brain. There are several types of encephalitis viruses, including herpes simplex virus, Jamestown Canyon virus, West Nile virus, and Japanese encephalitis virus. Other synonyms that may be used for encephalitis viruses include viral encephalitis, brain fever, and arboviral encephalitis. Symptoms of encephalitis virus infection can include fever, headache, confusion, seizures, and other neurological symptoms. Most cases of encephalitis virus infection are mild, but severe cases can lead to brain damage, coma, and even death. Prevention measures such as vaccination and measures to prevent mosquito and tick bites can help reduce the risk of encephalitis virus infection.