âThe Shot Heard âRound the Worldâ, those familiar with Ralph Waldo Emersonâs 1837 poem Concord Hymn instantly associates the phrase with the American Revolution; however, I suggest they could also associate the phrase with Jonas Salkâs 1938 development of the Flu vaccine, or âshotâ. Why is the flu shot so important that it could be mentioned in the same breath as the American Revolution? Well, twenty years prior to Salkâs...
