Question

A. Fill in the blanks.
1. Scurvy is caused by the deficiency of ______.
2. Malaria is transmitted by _____ mosquitoes.
3. Goitre is caused by the deficiency of _____.
4. A vector is a _____ of disease.
5. Antibodies are produced in response to the presence of _____ in the body.
6. Vaccines give us ______ against diseases.
7. Tobacco contains an addictive substance called ______.
8. Sharing needles for injections spreads the virus called _____.
9. A person who gets a deep cut may need to be given a ______ vaccine.
10. _____ and _____ are insects whose venom commonly causes allergic reactions.

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