他最终被吉尼斯世界纪录认定为存活时间最长的铁肺患者。 The polio vaccine emerged in the 1950s 脊髓灰质炎疫苗出现于20世纪50年代 In 1955, the polio vaccine developed by Jonas Salk and his colleagues became an essential tool to fight the feared disease — and one for which Salk never sought a pat...