Which disease can be controlled by vaccination?
Correct answer: A. Measles
- A. Measles
- B. Cancer
- C. Diabetes
- D. Heart attack
Explanation
Measles is caused by a virus and can be effectively prevented through vaccination, which prepares immune memory before infection occurs. Cancer may be chosen because vaccines such as HPV vaccine reduce the risk of some cancers, but cancer as a broad group is not generally controlled by routine vaccination in the way measles is.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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