How effective is the vaccine?

Vaccine is mainly treated according to virus or bacteria, and then injected into human body as antigen, which makes human body produce immune response and antibody. When real viruses and bacteria enter the human body again, the antibodies that have been produced will carry out an immune reaction, destroying the invading antigens, that is, germs, viruses or bacteria, and preventing children from getting sick after being exposed to viruses and bacteria. Therefore, the vaccine has a good protective effect on children's early low immunity or special diseases or infectious diseases.

Of course, the protection time of each vaccine is different, some are longer, which will form long-term immune protection for children, and some are shorter, and the protection time is about one year. The immune protection time of different vaccines is different. At the same time, there are also efficiency problems in the process of vaccination. Not 100% can achieve effective immune protection, some are 70%, and some may reach 80%-90%, that is, children may get sick after vaccination. In addition, the vaccine will also have an immune reaction during the vaccination process, because viruses and bacteria enter the human body after treatment, so there will be a vaccine reaction, which needs our attention.