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Environment In Relation To Human Welfare Water And Food Brone Diseases - Questions and Answers

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21. Vaccines against cholera immunize for
A. 6 weeks
B. 6 months
C. 6 years
D. life long
Explanation:
22. Common cold is caused by more than
A. 20 different viruses
B. 50 different viruses
C. 80 different viruses
D. 100 different viruses
Explanation:
23. Entamoeba histolytica is a
A. Bacterial parasite
B. Viral parasite
C. Helminthic parasite
D. Protozoan parasite
Explanation:
24. Incubation period of measles is
A. 60-160 days
B. 15-40 days
C. 10 days to 11weeks
D. 10-14 days
Explanation:
25. Dysentery caused by E. histolytica is called
A. Cholera
B. Amoebiasis
C. Typhoid
D. Polio
Explanation:
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