Vaccination is one of the most economical and effective ways to prevent and control infectious diseases  Everyone will be vaccinated with a variety of vaccines after birth  Vaccination can enhance the body's resistance, improve its own immunity and resist the invasion of bacteria  Vaccine is a kind of pathogen with low toxicity, and people will produce corresponding antibodies against it after vaccination  When the immune response of the vaccine subsides, the corresponding antibody of the vaccine stays in the body for a long time, while another type of immune cells with memory function will record information about the pathogen
When the human body encounters the same pathogen again, memory immune cells will quickly mobilize the corresponding antibodies that already exist to form an effective defense response
It is a widely used biomedical product.