Question

Immunity!What is immunity? Please explain to me about innate immunity & aquired immunity. I also want to know what comes under aquired immunity (for example, naturally acquired immunity & artificially acquired immunity).
What is active immunity and passive immunity?

I wannto know all these. Please help me!

Accepted Answer

I think you should just focus on the two answers to your original question.  Innate immunity means that an organism already has a way to avoid disease.  Acquired immunity, on the other hand, means that this organism somehow found a way to become immune.

Answer

Thank you but anyway, is there any easy method to remember all these???

Answer

Immunity is a term to describe the ability of an organism to resist infection or disease by having a strong biological defense system.
Innate immunity is the immunity a baby inherited from its ancestor without any experience or exposure to the virus or desease. For example, response to a cold.
Acquired immunity is the immunity developed during life time in which the body is exposed to the desease or virus to develop a response. The following are types of acquired immunity (AI):
natural passive AI - acquired during pregnancy, the mother was exposed to the disease and transfered immunity to the baby (not genetic)
natural active AI - acquired by infection or actual exposure with the virus/disease. For example, back in the old time when there was no vaccine for chicken pox, people who had chicken pox cured themselves and develop immunity from chicken pox so that in the future they never get chicken pox again.
artificial passive AI - acquired by transfer of antibody. The antibody is synthesized in the laboratory, or isolated from biological organism and transfered to immunize another organism.
artificial acive AI - acquired by injection of vaccine. Vaccines contain the "disabled" virus or bacteria so that when injected do not cause symptoms of the illness but initiate the defense response and develop immunity.

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Related Questions

Define and classify immunity. Write briefly on innate immunity and artically acquired passive immunity.