随着人类社会的发展,自然环境的复杂,地球温度的升高,各种传染病层出不穷,家长都要给孩子注射各种传染病的疫苗,以增强孩子的抵抗病毒能力。但是,如果不了解预防接种和疫苗有关知识,可能会起到相反的效果。现行疫苗的优点和缺点目前,现行疫苗主要有:一是灭活疫苗。灭活疫苗进入人体后可直接引起免疫应答,不生长繁殖。而注射疫苗,则可使 With the development of human society, the complexity of natural environment, the rise of the earth’s temperature, endless variety of infectious diseases, parents should give their children vaccines against various infectious diseases to enhance their ability to resist viruses. However, knowledge of vaccination and vaccination may not be as effective as it can be. The advantages and disadvantages of the current vaccine At present, the current vaccines are mainly: First, inactivated vaccine. Inactivated vaccine into the human body can directly cause an immune response, no growth and reproduction. And vaccination, you can make