Polio eradication – so close but still not there! Here is an excellent recent 2 page wrap up by Dr S. Naqvi, our senior registrar in Infectious Diseases and Microbiology.  Polioviruses Naqvi 2020 tutorial

See also Circulating vaccine derived poliovirus – Papua New Guinea Disease outbreak news, 2 July 2018 (WHO)

Photo and table: Wikipedia