NURSING ANM AND GNM

Detailed explanation-1: -It is an antigen-independent (non-specific) defense mechanism that is used by the host immediately or within hours of encountering an antigen. The innate immune response has no immunologic memory and, therefore, it is unable to recognize or “memorize” the same pathogen should the body be exposed to it in the future.

Detailed explanation-2: -Most viral infections are limited by defenses that are antigen nonspecific and/or specific. Nonspecific defenses act sooner than specific defenses. Some are always in place (anatomic barriers, nonspecific inhibitors, and phagocytic cells); others are evoked by the infection (fever, inflammation, and interferon).