evidence: Offit said an example of a vaccine that sheds or creates what’s called contact immunity is the oral polio vaccine, which is no longer in use in the U.S. In that case, Offit said, people are given virus strains through the mouth; the virus then reproduces in the intestine and is shedded in the feces. Unvaccinated people pick up the virus from the vaccine mostly by touching things a vaccinated person had touched, especially if that person didn’t adequately wash their hands. [...] Several online posts falsely claim Pfizer "admits" that unvaccinated people can be environmentally exposed to the spike protein "by inhalation or skin contact" if in close proximity with vaccinated people. [...] A Pfizer spokesperson said the vaccine does not cause shedding because it is not a live virus.