CDC: 700% increase in polio cases caused by oral polio vaccine
Polio caused by oral polio vaccine is spreading and paralyzing children outside the United States. According to CDC, there was an alarming 700% increase in vaccine-derived poliovirus cases last year compared to 2021. The US stopped using oral polio vaccine in 2000 because it can rarely cause polio in children, but the oral version is […]
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