(1). Poliomyelitis or polioIs a serious infection.P.It often attacks childrenparalyzing them for life.Q. In the (1)950's a vaccineagainst the disease wasintroduced.R. Hence it is sometimes calledinfantile paralysis.S. It is caused by a virus.(6). Since then polio has beeneliminated to a great extent.

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(1). Poliomyelitis or polioIs a serious infection.P.It often attacks childrenparalyzing them for life.Q. In the (1)950's a vaccineagainst the disease wasintroduced.R. Hence it is sometimes calledinfantile paralysis.S. It is caused by a virus.(6). Since then polio has beeneliminated to a great extent.






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