Wild Polio Virus - 1: There have been 7 cases since 1st January vs 20 cases at this time in 2015. 6 of these cases were in Pakistan vs 19 cases, and 1 case in Afghanistan vs 1.
Wild Polio Virus - 3: No cases since November 2012
Vaccine Derived Polio Virus - 1: 3 cases reported since 1st January 2016, all in Laos. There were 20 cases worldwide in 2015.
Vaccine Derived Polio Virus - 2: No cases since 1st January. There were 12 cases worldwide in 2015.
Vaccine derived polio only occurs when the oral polio vaccine is used, more and more countries are now using the inactive polio vaccine which cannot cause vaccine derived polio.
Mansel Thomas
End Polio Now Co-ordinator.
back Each year we raise money to support a wide range of international charities. UPDATE MAY 2023 The latest spring/summer update from Classrooms in the Clouds....