EVERYDAY SCIENCE

Detailed explanation-1: -Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Newer vaccines contain the blueprint for producing antigens rather than the antigen itself.

Detailed explanation-2: -The bacteria or virus will be killed, greatly weakened, or broken down into small parts before use in the vaccine so that they can trigger an immune response without making you sick. Your immune system will still attack the harmless form of bacteria or virus from the vaccine and will produce antibodies to fight it off.

Detailed explanation-3: -So the correct answer is “ Vaccines are preventive means to fight diseases".

Detailed explanation-4: -The body produces antibodies against the infectious agent. The body begins to formulate an immune response to build resistance against the foreign particle. Hence, via this method, the body develops immunity against the infectious agent through the vaccine.

Detailed explanation-5: -A vaccine is defined as any substance which is used to stimulate the production of antibodies, in turn providing immunity against one or a few diseases. A vaccine is defined as a biological preparation formulated to provide acquired immunity for a particular disease.