Status: no longer affected by circulating vaccine-derived poliovirus 2 (cVDPV2) but remains vulnerable to re-infection

Polio this week in Liberia

  • Four cVDPV2-positive environmental samples were reported in Montserrado.

International Health Regulations

Liberia is classified by the International Health Regulations (IHR) as a state no longer infected by cVDPV, but which remains vulnerable to re-infection.  It is therefore subject to Temporary Recommendations issued by the International Health Regulations Emergency Committee on Polio Eradication (issued as of May 2023).

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.