PATHOLOGY

Detailed explanation-1: -Active Immunity results when exposure to a disease organism triggers the immune system to produce antibodies to that disease. Active immunity can be acquired through natural immunity or vaccine-induced immunity.

Detailed explanation-2: -IgG antibodies help protect your body from viral and bacterial infections. Found in your blood and lymph system, IgM antibodies act as the first line of defense against infections. They also play a large role in immune regulation.

Detailed explanation-3: -The B lymphocytes (or B-cells) create antibodies and alert the T lymphocytes (or T-cells) to kill the pathogens. White blood cells are a part of the lymphatic system, a network of lymph vessels that collect excess fluids from tissues throughout the body and then return them to your bloodstream.

Detailed explanation-4: -As all viruses replicate within cells and many of them spread directly between cells without re-entering the extracellular environment, resolution of infection is reliant more on T-cell function than on antibody.