Antibodies are protein molecules produced in our body against the antigens to protect our body from the infections.

It is a type of immune cell which is produced in the bone marrow and is found in the blood and lymph tissue. It is a white blood cell which had produced in our body to fight against the infection. T-lymphocyte and B-lymphocyte are two types of lymphocytes which protect us from antigens.

Vaccination is a process of introducing small amounts or reduced effectiveness antigens into the body which triggers active immunity and helps the body generate memory cells for a further encounter. The antibodies produced help in the process. They can be classified into heat-killed virulent, live nonvirulent, isolated antigens, modified toxins, and genetically engineered antigens.