The Pan American Health Organization / World Health Organization (PAHO/WHO) recently confirmed that Canada joined the United States, Israel, and the United Kingdom in detecting vaccine-derived poliovirus type 2 (VDPV2) in wastewater samples in 2022.
The Canadian National Microbiology Laboratory (NML) retrospectively tested wastewater samples and found 3 of 26 samples tested positive for poliovirus by real-time PCR.
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