Do you want to prevent disease?
Ways in which the public prevents the spread of diseases.
Vaccines help prevent the spread of disease
Vaccine requirements help eliminate susceptible hosts. Vaccines protect you by preparing your immune system to recognize and fight serious, and sometimes deadly, diseases. A vaccine contains a specific part of a germ an antigen. The antigen is killed or disabled before it's used to make the vaccine, so it can't make you sick. Vaccines, and the antigens they contain, stimulate your immune system's B cells to develop protective substances called antibodies. These antibodies are responsible for killing germs that enter your body. Once activated, B cells can stay in your body for a lifetime and allow your body to remember the germ that stimulated their creation. Throughout your life, these cells will recognize and fight the actual disease caused by the germ when and if you come into contact with it.
If a certain portion of the populations is immune to a disease the pathogen will die before it finds a host.
If elimination of the pathogen does not occur they will only be a few cases of the disease.
Children are required to get certain vaccines before they can say school to eliminate susceptible hosts.