This week, via the Global Polio Laboratory Network (GPLN), we received advance notification of a cVDPV2 from an AFP case detected in Eritrea. The isolated virus is linked to VDPV2 last detected in July 2020 in Sudan, and belongs to the CHA-NDJ-1 emergence, originating in Nigeria. The case had onset of paralysis in September 2021.
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
South Sudan 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 February 2022.
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.