Question
What is immunity? Distinguish between active and passive immunity.
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Answer
Immunity means, "ability of an organism to resist injection by parasites and effect of any harmful agents."
Active immunity : This includes natural immunity, in which animals memory cells respond to a secondary natural contact with antigen by multiplication and specific antibody release.
Possive immunity : It may be either natural, as by the aguisition of antibodies via the placenta or colostrum in mammals, or injured, usually via specific antibodies injected introvenously.
Active immunity : This includes natural immunity, in which animals memory cells respond to a secondary natural contact with antigen by multiplication and specific antibody release.
Possive immunity : It may be either natural, as by the aguisition of antibodies via the placenta or colostrum in mammals, or injured, usually via specific antibodies injected introvenously.
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