Status: affected by circulating vaccine-derived poliovirus type 2 (cVDPV2)

Polio this week in Djibouti

  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported this week.
  • Following breakthrough transmission, two National immunization days (NIDs) were approved by the OPV2 Advisory Group on 6 July 2022. Campaign preparations are under way, though R1 has been delayed to 10 October 2022 due to a measles outbreak response campaign targeting 45,000 children aged 6-59 months in four regions.
  • nOPV2 for the two planned NIDs is in country, ready to be dispatched as per logistics plan in advance of the 10 October 2022 start date. The remaining expired nOPV2 vaccines (769 vials) from the March 2022 campaign have been destroyed as per protocol.

WHO risk assessment

WHO considers there to be high risk of international spread and/or emergence of cVDPV2 of this strain, particularly across other areas of the Horn of Africa, due to the low population immunity and inadequate routine immunization levels in some areas, and large-scale population movements.  In all instances, the continued spread of existing outbreaks as well as the emergence of new outbreaks of cVDPV2 point to gaps in routine immunization coverage and inadequate outbreak response vaccination.  The risk of further spread of such strains, or the emergence of new strains, is magnified by decreased immunization rates related to the ongoing COVID-19 pandemic.

International Health Regulations

Djibouti is classified by the International Health Regulations (IHR) as a state infected with cVDPV2, with potential risk of international spread.  It is therefore subject to temporary recommendations as of 15 June 2022.

Travel advice

WHO’s International Travel and Health recommends that all travellers to polio-affected areas be fully vaccinated against polio. Residents (and visitors for more than 4 weeks) from infected areas should receive an additional dose of OPV or inactivated polio vaccine (IPV) within 4 weeks to 12 months of travel.