On July 21, 2022, New York state health officials announced the first case of polio in the U.S. since 2013. The U.S. resident, who is suffering from muscle weakness and paralysis had not been vaccinated. Before safe and effective vaccines were invented in the mid-20th century, polio was a common
children in the U.S. receive the inactivated polio vaccine. It provides nearly complete protection from paralytic polio.The weakened form of the live virus in the oral vaccine cannot cause disease directly. However, because the vaccine is given orally, the weakened virus is excreted in the feces. From there it can
. If the weakened virus circulates from person to person for long enough, it can mutate and regain its ability to cause paralysis.in communities with poor sanitation and low vaccination rates, resulting in disease and even paralysis. Fortunately, this is an exceedingly rare occurrence. With more than 10 billion doses of the oral polio vaccine administered since 2000,Apparently, the current patient in New York was somehow exposed to a mutated poliovirus that had been transmitted after vaccination overseas. Earlier this summer, routine surveillance spottedWhy use the oral vaccine anywhere if it comes with this risk?
There’s actually a positive aspect to the fact that the weakened live virus can circulate in the community once oral vaccine recipients shed it in their feces. Traveling a feces-to-oral route, it can
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