Vaccination is the administration of the vaccine to prevent infectious disease. A vaccine or antigenic material is a biological preparation when injected into the body stimulates the body’s immunity system to help defeat the contagious disease. It prepares the body to fight the future occurrence of any illness for which the vaccine has been created. The vaccine contains an agent that replicates the specific disease-causing microorganism which is prepared from a weakened version of the microbe. This agent when enters the body increases stimulation abilities of the immune system so that it recognizes it as a threat. Then the immune system acts accordingly to destroy the agent. It performs a mock test to prepare the body for the unforeseen future.
With the widespread use of vaccination, people have been able to combat diseases such as smallpox, tetanus, polio, measles, etc.