Same chapter3 marksDifficulty: Medium
State four ways of preventing the spread of water-borne diseases.
Health and Hygiene
3 marksDifficulty: Medium
What is immunity? Distinguish between active and passive immunity.
Original Khojo Papers practice question — not from a past board paper.
Answer
Immunity is the ability of the body to resist a disease. Active immunity is produced when the body makes its own antibodies after an infection or a vaccination, and it lasts a long time. Passive immunity is produced when ready-made antibodies are given, as in an antiserum or through the mother's milk, and it acts at once but lasts only a short time.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Vaccination gives active immunity without causing the disease.
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