" Polio, a viral illness that can cause paralysis, is considered highly contagious but has been eradicated in most countries since vaccines were developed in the 1950s. Most children around the world are now vaccinated at an early age with the inactivated poliovirus vaccine (IPV) as part of routine public health policy. The active oral vaccine (OPV) is administered in places endemic for polio or where the risk of transmission is high. "
Posted on: Sun, 04 Aug 2013 21:27:16 +0000
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