From the February 2020 Rotarian magazine:
"Rotary and its partners in the Global Polio Eradication Initiative celebrated a milestone: confirmation that the type 3 strain of wild poliovirus has been eradicated globally. It is only the third human disease-causing pathogen that has ever been eradicated, after smallpox and the type 2 wild poliovirus strain. This means only the type 1 strain of wild poliovirus continues to affect children - a significant step toward the ultimate goal of eliminating polio altogether."(61)