Two general types of immunity are recognized – natural immunity and acquired immunity. The word "immune" is derived from the Latin stem immuno, meaning safe, or free from. In its most general sense, the term implies a condition under which an individual is protected from disease. This does not mean, however, that one is immune to all diseases, but rather [...]
In this article we will discuss about innate and acquired immunity. Innate Immunity: It refers to all the defence elements with which an individual is born and always available to protect the body. It is a non-specific type of defence system. (i) It is present from the time of birth and inherited from parents. (ii) It consists of four types [...]
The following points highlight the three main types of immunity present in humans. The types are: 1. Innate (Natural or Nonspecific) Immunity 2. Acquired (Specific or Adaptive) Immunity 3. Active and Passive Immunity. Type # 1. Innate (Natural or Nonspecific) Immunity: Innate immunity (also called nonspecific or natural immunity) refers to the inborn-ability of the body to resist, and is [...]