WHO and partners immunized over 155 000 migrant children through special vaccination posts in South Sudan: In response to the poliomyelitis outbreak associated with type 2 circulating vaccine-derived poliovirus (cVDPV2) and ambiguous vaccine derived polio virus (aVDPVs) identified in Unity state, the World Health Organization (WHO), in collaboration with Ministry of … [Read more...] about WHO and partners immunized over 155 000 migrant children through special vaccination posts in South Sudan