Welcome to the NCERT Solutions for Class 12 Biology - Chapter Human Health and Disease. This page offers a step-by-step solution to the specific question from Exercise 0, Question 1: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.
Differentiate between active immunity and passive immunity.
Difference between active immunity and passive immunity are as follows:
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Active immunity |
Passive immunity |
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It is developed due to contact with pathogen or its antigen. |
It is developed when ready- made antibodies are injected into the body. |
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It has no side effects. |
It may cause a reaction. |
|
It is slow but long lasting. |
It is fast but lasts only for few days. |
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It takes time to develop its response. |
It is used when the immune response has to be faster. |
|
Immunity is said to be active when person’s own cells produce antibodies in response to infections or vaccination. |
Immunity is said to be passive when antibodies are produced in other organisms are injected into person to person to counteract antigen such as snake venom. |
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E.g. vaccination for polio etc. |
E.g. administration of tetanus antitoxins etc. |
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