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21. One of the most powerful and cost-effective weapons of modern medicine is
A. Incubation
B. Immunization
C. Transmission
D. Sanitation
Explanation:
22. The entry of micro-organisms is prevented by the chemical substance which is secreted by
A. Sweat glands
B. Gastric glands
C. Pancreatic glands
D. Salivary glands
Explanation:
23. A deviation from normal functioning or the state of complete physical or mental well being is called
A. Health
B. Immunity
C. Disease
D. Host
Explanation:
24. Children require measles vaccine in
A. One dose
B. Two doses
C. Three doses
D. Four doses
Explanation:
25. Tuberculosis vaccine is also known as
A. BCG
B. DPT
C. MMR
D. DT
Explanation:
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