Poliovirus is spreading in New York. Here’s what you need to know
The virus could spread further in communities with low polio vaccination rates
Oral polio vaccines (shown) have been a key tool in global efforts to eradicate the virus. But the vaccines contain weakened viruses that can replicate and spread to others, and can, in rare cases, regain the ability to cause disease and spark outbreaks among communities with low vaccination rates.
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