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2.the full form of HIV is Human Immunodeficiency Virus. HIV causes AIDS disease.

4. To DEVELOP the fighting capability in the body to a disease in called immunisation.

16.because male anopheles mosquito does not suck blood of a person and hence does not spread malaria disease.

18 a) because common cold is a communicable disease. This disease is caused by virus.

19. AIDS stands for Acquired Immune Deficiency Syndrome.

20.(a) because in balanced diet we TAKE a HEALTHY food.

b) because due to STAGNANT water,the micro organisms are increasing and causing diseases

e) if the surrounding environment conditions are well, neat and clean, then no micro organisms are there and not causing disease.

21.the wastes in hospital should be DISPOSED properly because it can cause harmful diseases.

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