Vaccination

A vaccine produces an immune response to the pathogen by introducing the antigen in a harmless form into the body. This reduces the chance of the individual contracting the disease. The individual can still get an infection but they will suffer few or no symptoms because the secondary immune response is faster and stronger.1. Vaccines should be economically available in sufficient quantities to immunise most of the vulnerable population.2. Vaccines should have few side effects.3. A means of storing, transporting and administering the vaccines are needed.4. The vast majority of the population should be vaccinated to produce herd immunity.