Polio: Infectious disease caused by virus & effects - Science & Technology

Q.  Which of the following statements are correct?

1. Polio is an infectious disease caused by a virus which invades the nervous system and may cause irreversible paralysis.
2. It can strike at any age but mainly affects children under five.
3. Polio vaccine, given multiple times, can protect a child for life.
4. As long as a single child remains infected with polio, unvaccinated children in all countries are at risk.
- Published on 18 Aug 15

a. 1,2,3
b. 2,3,4
c. 1,3,4
d. All the above

ANSWER: All the above

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