Same chapter3 marksDifficulty: Medium
What is immunity? Distinguish between active and passive immunity.
Health and Hygiene
3 marksDifficulty: Medium
State four ways of preventing the spread of water-borne diseases.
Original Khojo Papers practice question — not from a past board paper.
Answer
Drinking water should be boiled, filtered or chlorinated before use. Sewage must be disposed of so that it cannot contaminate drinking water. Food should be covered and hands washed before eating. Water sources should be protected and tested, and people vaccinated where a vaccine exists.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Cholera, typhoid and hepatitis A all spread through contaminated water.
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