Comment 714 www. thelancet. com Vol 400 September 3, 2022 risk of vaccine-associated
paralytic poliomyelitis caused by Sabin 2. 6 Although most countries eliminated Sabinlike …

Before the development of the inactivated poliovirus vaccine (IPV) and live oral poliovirus
vaccine (OPV), sporadic outbreaks of poliomyelitis were reported to cause as many as 18 …

In 2013, Israel's Ministry of Health reported that wild poliovirus (ie, non Sabin) type 1 (WPV1)
had been detected in many environmental sewage samples from southern and central …

Thirty-one ongoing and new cVDPV type 2 (cVDPV2) outbreaks were documented during
July 2019–February 2020; nine outbreaks spread internationally. New cVDPV2 outbreaks …

In 1988, the World Health Assembly resolved to eradicate poliomyelitis worldwide (1). One
of the main tools used in polio eradication efforts has been live, attenuated oral poliovirus …

After the 2016 synchronized switch from trivalent oral poliovirus vaccine (OPV)(types 1, 2,
and 3) to bivalent OPV (types 1 and 3), transmission of type 2 circulating VDPVs (cVDPVs) …

Since the World Health Assembly's 1988 resolution to eradicate poliomyelitis (1), one of the
main tools of the World Health Organization (WHO) Global Polio Eradication Initiative (GPEI) …

Background Expanding outbreaks of circulating vaccine-derived type 2 poliovirus (cVDPV2)
across Africa after the global withdrawal of trivalent oral poliovirus vaccine (OPV) in 2016 …

Background Vaccine derived poliovirus (VDPV) remains a major barrier to polio eradication,
and recent growing emergences are concerning. This paper presents the global …

With continued wild poliovirus transmission in Afghanistan and Pakistan and circulating
vaccine-derived poliovirus in certain countries, there exists an ongoing risk of importation of …