The US now joins a list of nearly 30 other countries with circulating vaccine-derived poliovirus (cVDPV) identified by the WHO, the US Centers for Disease Control and Prevention (CDC) said.
The polioviruses found in New York, both from the case of paralytic polio in an unvaccinated adult in Rockland County in New York and in several wastewater samples from communities near the patient’s residence, meet the WHO’s criteria for cVDPV, according to the CDC.
It means that poliovirus continues to be transmitted in Rockland County and surrounding areas, said the US health agency.
The virus’s genetic sequences from the patient from Rockland County and wastewater specimens collected in New York have been linked to wastewater samples in Jerusalem, Israel and London, indicating community transmission, according to the health agency.
The cVDPV occurs when local immunity to poliovirus is low enough to allow prolonged transmission of the original weakened virus in the oral polio vaccine, according to the CDC.
Edits by EP News Bureau