IMMUNOLOGY

Detailed explanation-1: -Individuals rely on active immunity more so than passive immunity. Active immunity is created by our own immune system when we are exposed to a potential disease-causing agent (i.e., pathogen).

Detailed explanation-2: -Immunity is the body’s ability to protect against all types of foreign pathogens which enter the body.

Detailed explanation-3: -These specialized cells and parts of the immune system offer the body protection against disease. This protection is called immunity.

Detailed explanation-4: -Immunological memory is the ability of the immune system to respond more rapidly and effectively to pathogens that have been encountered previously, and reflects the preexistence of a clonally expanded population of antigen-specific lymphocytes.

Detailed explanation-5: -Pathogenicity refers to the ability of an organism to cause disease (ie, harm the host). This ability represents a genetic component of the pathogen and the overt damage done to the host is a property of the host-pathogen interactions. Commensals and opportunistic pathogens lack this inherent ability to cause disease.