In the spring of 1976, it looked like that year’s flu was the real thing. Spoiler alert: it wasn’t, and rushed response led to a medical debacle that hasn’t gone away. “Some of the American public’s hesitance to embrace vaccines — the flu vaccine in particular — can be attributed to the long-lasting effects of a failed 1976 campaign to mass-vaccinate the public against a strain of the swine flu virus,” writes Rebecca Kreston for Discover. “This government-led campaign was widely viewed as a debacle and put an irreparable dent in future public health initiative, as well as negatively influenced...