Update on Vaccine-Derived Poliovirus Outbreaks — Worldwide, July 2019–February 2020

Mary M. Alleman, PhD; Jaume Jorba, PhD; Sharon A. Greene, PhD; Ousmane M. Diop, PhD; Jane Iber, MSc; Graham Tallis, MBBS; Ajay Goel, MSc; Eric Wiesen, MS; Steven G.F. Wassilak, MD; Cara C. Burns, PhD


Morbidity and Mortality Weekly Report. 2020;69(16):489-495. 

In This Article

Detection of cVDPV Type 1

No poliovirus genetically linked to the Papua New Guinea cVDPV type 1 (cVDPV1) emergence (PNG-MOR-1§) was detected after November 2018.[1,2] In Indonesia, the most recent cVDPV1 outbreak isolate was from February 2019 (IDN-PAP-1), and in Myanmar (Burma), the most recent were from August 2019 (MMR-KAY-1)[2] (Table) (Figure 1). During the reporting period, a new cVDPV1 emergence (PHL-NCR-2) was first detected in environmental surveillance (sewage) samples collected in July 2019 in the National Capital Region of the Philippines. Genetically linked virus was isolated from sewage samples collected in Sabah State, Malaysia, in June and November 2019; however, delays in sample processing resulted in findings not being released until December 2019. The most recent isolate linked to PHL-NCR-2 was detected in a specimen from a patient from Malaysia with acute flaccid paralysis (AFP) onset in January 2020.

Figure 1.

Ongoing circulating vaccine-derived poliovirus (cVDPV) outbreaks — worldwide, July 2019–February 2020*
Abbreviations: cVDPV1 = cVDPV type 1; cVDPV2 = cVDPV type 2.
*Data as of March 24–27, 2020.

§Names designate the country and geographic region of the emergence and the number of emergences in each geographic region.