Japanese encephalitis

…most common epidemic forms is Japanese encephalitis, which is caused by a mosquito-borne virus and results in acute illness. Japanese encephalitis is found primarily in Asia. Other viral forms of encephalitis, such as St. Louis encephalitis and La Crosse encephalitis, cause sporadic disease in some areas of the United States.…

Other types include Japanese encephalitis and St. Louis encephalitis, which are caused by strains of flavivirus.

…the multiple safe and effective Japanese encephalitis vaccines that became available in the 1990s and 2000s, reductions in incidence have been substantial, particularly among children ages 15 and younger.

varieties of encephalitis, especially Japanese encephalitis, both Eastern and Western equine encephalitis, and St. Louis encephalitis. The insects contract the causative viruses by feeding on infected birds (especially sparrows, pigeons, blue jays, and robins). Then they pass the viruses along to humans. Japanese