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Created in 1976, this historic photograph showed an adult female receiving a vaccination that was administered by a public health clinician, by way of a jet injector, also known as a “Ped-O-Jet®”, during the nationwide Swine Flu vaccination campaign

Created in 1976, this historic photograph showed an adult female receiving a vaccination that was administered by a public health clinician, by way of a jet injector, also known as a “Ped-O-Jet®”, during the nationwide Swine Flu vaccination campaign, which began October 1, 1976. CDC (CC0)