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| Active and Passive Immunity |
Difference Between: Active and Passive immunity
Active immunity
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Passive immunity
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1
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Direct contact with pathogen or its antigen is required
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No direct contact with antigen is required. Antibodies are directly injected from outside.
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2
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A time period is required for immunity development
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Immunity develops immediately.
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3
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Antibodies are produced within the body in response to pathogen or antigen
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Antibodies are injected into the body are obtained from outside.
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4
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It lasts for a long period
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It lasts for a few days.
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5
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Immunologic memory may result in life long immunity
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Only for few days
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6
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Not much side effects
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At times body reacts to the introduced antisera. The condition is called serum sickness.
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