Immunisation provides immunity to communicable diseases. This is achieved by injecting or administering orally, small amounts of dead or weakened antigens into the body. This is called vaccination. The body is stimulated to produce antibodies. Often a second booster injection is give to stimulate a faster and longer-lasting production of antibodies.

The skin is the body's first line of defense. It acts as a physical barrier. When there are breaks in this barrier, such as cuts or sores, the body reacts to produce blood clots and a mesh work of fibrous tissue. The opening is thus blocked, which prevents germs that can cause disease, from entering … Read more