NOTE:An inoculation designed to prevent POLIO. The killed virus vaccine (IPV) is currently recommended for almost all children in the United States. Until recently, the live oral polio vaccine (OPV) was recommended for most children. While both vaccines provide immunity to polio, OPV was better at keeping the disease from spreading to other people. However, for a few people (about one in 2.4 million), OPV actually caused polio. Since the risk of getting polio in the United States is now virtually gone, experts believe that using oral polio vaccine is no longer worth the slight risk. The killed virus polio shot (IPV) never causes polio.
México a la vanguardia en el Síndrome de Post Polio