Answer:
INNATE IMMUNITY
Innate or non-specific immunity is a system of defenses with which you were born and that protects you against all antigens. Innate immunity consists of barriers that prevent harmful materials from entering the body. These barriers form the first line of defense in the immune response. Examples of innate immunity include:
The cough reflex
Enzymes in tears and skin oils
Mucus, which traps bacteria and small particles
The skin
Gastric acid
Innate immunity also comes in the form of a protein chemical, called innate humoral immunity. Examples include: the system of body supplements and substances called interferon and interleukin 1 (which causes fever).
If an antigen crosses these barriers, it is attacked and destroyed by other parts of the immune system.
IMMUNITY ACQUIRED
It is the immunity that develops with exposure to various antigens. The person's immune system builds a defense against that specific antigen.
PASSIVE IMMUNITY
Passive immunity is due to antibodies that are produced in a body other than ours. Babies have passive immunity, since they are born with the antibodies that the mother transfers to them through the placenta. These antibodies disappear between 6 and 12 months of age.
Passive immunity may also be due to the injection of antiserum, which contains antibodies formed by another person or animal. This provides immediate protection against an antigen, but does not provide lasting protection. Serum immunoglobulin (administered for hepatitis exposure) and tetanus antitoxin are examples of passive immunity.
