在广西隆安县人们发现，普及接种免受乙肝病毒侵害的乙肝疫苗，同时显现了防癌功效。经过十多年新生儿乙肝计划免疫，不仅大大降低了当地儿童和青少年乙肝病毒携带率，避免了大量儿少乙肝病例的出现，而且使肝癌初发年龄后推了十余年，对岁前的肝癌病例近年已经消失。隆安县是 People in Longan County, Guangxi Province have found that hepatitis B vaccines that are inoculated against hepatitis B virus are popularized and that their anti-cancer efficacy has been shown. After more than ten years of neonatal hepatitis B immunization, it not only greatly reduced the rate of hepatitis B virus in local children and adolescents, prevented the emergence of a large number of cases of children with hepatitis B, and pushed the initial age of liver cancer after more than ten years. Liver cancer cases have disappeared in recent years. Longan County is