Yemen

Status: affected by circulating vaccine-derived poliovirus 1 (cVDPV1) and (cVDPV2)

Polio this week in Yemen

  • No new cases were reported in the past week.  The total number of cVDPV2 cases in 2021 is ten, and the total number of cVDPV1 cases in 2021 is three (none since March 2021).
  • In response to the cVDPV2 outbreak:
      • A surveillance enhancement plan has been finalized and is being implemented
      • Vaccination response is tentatively planned to commence 23rd January 2022.
        • The SIA budget is approved and teams are waiting for funds to be released to the country office.
        • 12.4 million doses of trivalent OPV have arrived in Aden (2.9m doses) and Sana’a (9.5m doses)
        • The outbreak response plan, including SIA operations, Vaccine Management and C4D/Communication activities has been finalized.
  • Read our Yemen country page for more information.

Yemen is affected by a circulating vaccine-derived poliovirus type 1 (cVDPV1) and (cVDPV2).

With large-scale population movements with other areas of the Horn of Africa, notably Djibouti and northern Somalia, a more thorough Horn of Africa risk assessment to both type 1 and type 2 poliovirus is being conducted.

WHO advice

It is important that all countries, in particular those with frequent travel and contacts with polio-affected countries and areas, strengthen surveillance for AFP cases in order to rapidly detect any new virus importation and to facilitate a rapid response. Countries, territories and areas should also maintain uniformly high routine immunization coverage at the district level to minimize the consequences of any new virus introduction.

International Health Regulations

In its report from its most recent meeting in November 2021, the Emergency Committee under the International Health Regulations (2005) on the international spread of poliovirus expressed concern at the continued rapid spread of cVDPV2 and noted that the risk of international spread of cVDPV2 is currently high. The Emergency Committee strongly urged the implementation of advice aimed at reducing this risk.

Travel advice

It is important that all countries, in particular those with frequent travel and contacts with polio-affected countries and areas, strengthen surveillance for AFP cases and commence planned expansion of environmental surveillance in order to rapidly detect any new virus importation and to facilitate a rapid response. Countries, territories and areas should also maintain uniformly high routine immunization coverage at the district level to minimize the consequences of any new virus introduction.