Answer :

Immunity - It is the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.

Antigen - An antigen is a molecule capable of inducing an immune response on the part of the host organism, though sometimes antigens can be part of the host itself. An antigen is any substance that causes an immune system to produce antibodies against it.


Antibody - An antibody, also known as an immunoglobulin, is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune system to neutralize pathogens such as bacteria and viruses


Antibiotics -Antibiotics, also called antibacterials, are a type of antimicrobial drug used in the treatment and prevention of bacterial infections. They may either kill or inhibit the growth of bacteria.


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