The World Health Organization (WHO) recently released a statement from its Eighth International Regulations (IHR) Emergency Committee meeting about poliovirus spreading internationally.
The meeting was held during a teleconference on Feb. 12. They also looked at data about the circulating vaccine-derived polioviruses (cVDPV).
These cVDPV are especially worrisome as they show serious errors in the immunity against poliovirus. These are attributed to flaws in the routine immunization coverage in nations that would otherwise be free of the virus. It is considered a priority to stop type 2 cVDPVs because of the worldwide synchronized withdrawal of the type 2 OPV scheduled for April.
Currently, wild polio is internationally spreading, but there has been significant progress in stopping its transmission and in applying the Temporary Recommendations from the Director-General.
Because of these efforts, that has been an overall decrease in the international incidence of the virus. The committee was pleased with the progress and intensified efforts from Afghanistan and Pakistan, which continue to have ongoing poliovirus transmissions. The two nations have recommitted their anti-polio efforts to cooperate along their international border, despite challenging situations.