Summary
Date of assessment: 15 September 2022
Overall risk and confidence in the Region of the Americas (based on information available at the time of assessment)
Level of confidence in the available information: Moderate
Level of overall risk: High
Risk Assessment
The New York State Department of Health in the United States of America reported a case of paralytic polio in a 20-year-old immunocompetent, unvaccinated man in Rockland County in the State of New York on July 21, 2022.
Initial sequencing by the US Centers for Disease Control and Prevention (US-CDC) confirmed that it was a vaccine-derived poliovirus type 2. (VDPV2).
On September 13, 2022, the US-CDC reported the detection of VDPV2 in wastewater samples collected in Rockland County and nearby counties (Orange and Sullivan) on 3 and 11 August 2022 that were genetically related to the Rockland County case previously reported.
This situation demonstrates virus circulation and meets the criteria for being classified as circulating vaccine-derived.
Initial sequencing by the US Centers for Disease Control and Prevention (US-CDC) confirmed that it was a vaccine-derived poliovirus type 2. (VDPV2).
On September 13, 2022, the US-CDC reported the detection of VDPV2 in wastewater samples collected in Rockland County and nearby counties (Orange and Sullivan) on 3 and 11 August 2022 that were genetically related to the Rockland County case previously reported.
This situation demonstrates virus circulation and meets the criteria for being classified as circulating vaccine-derived.
With more than two years of the COVID-19 pandemic and the current monkeypox emergency, health systems in the Americas face significant challenges, particularly at the level of primary health care, where activities such as vaccination services have been impacted.
The decrease in vaccination coverage observed in several Region countries has been exacerbated by the pandemic, making the population more vulnerable to vaccine-preventable diseases (VPD).
As a result, new cases and/or outbreaks of VPDs, including poliomyelitis, cannot be ruled out in the Americas Region, adding to a limited capacity for timely response, leading to the conclusion that the regional risk remains High.
The decrease in vaccination coverage observed in several Region countries has been exacerbated by the pandemic, making the population more vulnerable to vaccine-preventable diseases (VPD).
As a result, new cases and/or outbreaks of VPDs, including poliomyelitis, cannot be ruled out in the Americas Region, adding to a limited capacity for timely response, leading to the conclusion that the regional risk remains High.
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