Immunisation is the process of a person being made immune or resistant to an infectious disease, typically by the administration of a vaccine. A vaccine provides an individual active acquired immunity to a particular infectious disease, like measles, polio, diphtheria and so on. Vaccines make us immune without making us sick. Vaccinations protect children from many serious yet preventable illnesses. Vaccinations are an important part of family and public health. While most parents ensure that their children receive the necessary vaccines until the age of 2, they tend to neglect the ones that need to be given at the age of 5 onwards, primarily due to the fact that booster shots and not the primary vaccines are administered at this age. A booster shot is a re-exposure that is intended to increase immunity after the primary vaccine is administered as the body’s memory against the vaccine declines over time.