我国有10%的健康人是乙肝病毒的慢性携带者,且乙肝的发病率逐年增高。预防乙肝最有效的方法就是接种乙型肝炎疫苗,凡没有感染过乙肝病毒者都应该注射乙肝疫苗。但是,您知道接种乙肝疫苗多久后失效吗?按照规定程序接种3针乙肝疫苗后15年,51%接种者体内仍含有对乙肝病毒的抗体,接种疫苗人群仍然对乙肝病毒有抵抗力。也就是说半数人群的免疫力至少能保持15年。但 10% of our healthy people are chronic carriers of hepatitis B virus, and the incidence of hepatitis B increased year by year. Hepatitis B prevention is the most effective way to vaccinate hepatitis B, who have not been infected with hepatitis B virus should be injected with hepatitis B vaccine. But do you know how long after the hepatitis B vaccine was given? After 15 years of 3-dose hepatitis B vaccine in accordance with the prescribed procedures, 51% of the vaccinates still contain antibodies to hepatitis B virus, and the vaccinated population is still resistant to the hepatitis B virus. In other words, the immunity of half of the population can last at least 15 years. but