PATHOLOGY

Detailed explanation-1: -Vaccines often provide long-lasting immunity to serious diseases without the risk of serious illness.

Detailed explanation-2: -When a person gets a vaccine, the immune system responds to the antigen as if it were exposed to the actual germ (it makes antibodies and remembers how to defeat it). Then, if the body gets exposed to the actual germ, the immune system can recognize it right away and quickly fight it off to prevent disease.

Detailed explanation-3: -Very few people-about three out of 100-who get two doses of measles vaccine will still get measles if exposed to the virus. Experts aren’t sure why. It could be that their immune systems didn’t respond as well as they should have to the vaccine.

Detailed explanation-4: -A vaccine is made up of killed or weakened disease-causing microorganisms Eg. But diabetes is a metabolic disorder and caused by the deficiency of insulin hormone and thus it cannot be controlled by vaccination. Smallpox, whooping cough, and polio are caused by pathogenic microorganisms.