戊型肝炎(简称“戊肝”)是如今世界各地流行的病毒性肝炎之一。据世界卫生组织估计,全球三分之一的人口曾感染过戊型肝炎病毒,在南亚和东亚每年约发生650万例戊肝,导致16万人死亡及2700例胎儿流产。近年来我国戊肝发病率逐年上升,已在成人急性肝炎中位居首位。戊肝疫苗的研制进展一 Hepatitis E (abbreviated as “Hepatitis E”) is one of the viral hepatitis currently circulating around the world. According to the estimates of the World Health Organization, one third of the world’s population has been infected with hepatitis E virus. About 6.5 million cases of hepatitis E virus occur annually in South Asia and East Asia, resulting in 160,000 deaths and 2,700 fetal abortions. In recent years, the incidence of hepatitis E in our country has been increasing year by year, and it has taken the first place in adult acute hepatitis. Development of hepatitis E vaccine one