The fifteen years of his tenure saw the development of two anti-polio vaccines : that of Jonas Salk at the University of Pittsburgh and the oral vaccine of Ohioan Albert Sabin .
Clack assumed the directorship of the Allegheny County Chapter of the March of Dimes in 1953 .
The fifteen years of Clack 's tenure saw the development of two anti-polio vaccines : that of Jonas Salk at the University of Pittsburgh and the oral vaccine of Ohioan Albert Sabin .
Clack assumed the directorship of the Allegheny County Chapter of the March of Dimes in 1953 .