WSKG (https://wskg.org/npr_story_post/from-polio-to-the-covid-vaccine-dr-peter-salk-sees-great-progress/attachment/bill-gates-speaks-in-2011-in-new-york-with-descendants-of-key-figures-in-the-fight-against-polio-peter-salk-left-and-cathy-hively-granddaughter-of-basil-oconnor-who-helped-to-battle-th/)