病毒性肝炎是我国常见的传染病,严重影响人民身体健康。它分为几种不同的类型,如甲型肝炎、乙型肝炎和非甲非乙型肝炎等。近年来,乙型肝炎的发病率越来越高,也严重地威胁着幼儿的健康。凡是体内能够检查到乙型肝炎表面抗原(HBsAg)的人,就是乙型肝炎病毒携带者。他们当中,有的可能已经发病,有的可能是处于 Viral hepatitis is a common infectious disease in our country that seriously affects people’s health. It is divided into several different types, such as hepatitis A, hepatitis B and non-A non-B hepatitis. In recent years, the incidence of hepatitis B is getting higher and higher, which also seriously threatens the health of young children. Those who can check the body to hepatitis B surface antigen (HBsAg) who is hepatitis B virus carriers. Some of them may have morbidities, and some may be at work