(i) Differences between innate immunity and acquired immunity are:
1.It includes the defence elements with which an individual is born.
2.It consists of various types of barriers that prevent the entry of foreign agents.
3.It remains throughout life.
1.It is immunity which is acquired after birth.
2.It consists of specialised cells (T-cells and B-cells) and antibodies that circulate in the body fluid.
3.It can be short lived or life long.
(ii) Differences between active immunity and passive immunity are:
1.It is developed due to contact with pathogen or its antigen.
2.It has no side effects.
3.It is slow but long lasting.
4.It takes time to develop its response.
5.e.g. vaccination for polio, etc.
1.It is developed when ready-made antibodies are injected into the body.
2.It may cause a reaction.
3.It is fast but lasts only for few days.
4.It is used when the immune response has to be faster.
5.e.g. administration of tetanus antitoxins, etc.