Vaccines are generally administered in children. When a disease carrying microbe enters our body, the body produces antibodies to fight the invader. The body also remembers how to fight the microbe if it enters again. The antibodies remain in the body and we are protected from the disease causing microbes.
Which disease has been eradicated from most part of the world due to worldwide vaccine campaign ?
A worldwide campaign against smallpox has finally led to its eradication from most parts of the world.The other campaign are against polio,cholera,tuberculosis also led in most part of the world.