前言流行性乙型腦炎是夏秋之間的一种急性传染病。最早报导于日本,所以也叫日本乙型腦炎。1921年,北京也曾有流行的报告,但过去一直未被重视。解放以来,党和政府,关心民瘼,重视人民健康;对一切危害最剧的急性传染病,都采取了积极的防治措施,尤其对本病的防治,更为重视。 Preface Encephalitis is an acute infectious disease between summer and autumn. The earliest reported in Japan, so called Japanese encephalitis. In 1921, there was a popular report in Beijing, but in the past it has not been taken seriously. Since the liberation, the party and the government have been concerned about people’s livelihood and people’s health. They have taken active preventive and control measures against all the most acute infectious diseases, especially the prevention and treatment of this disease.