In 2009 the world was gripped in Swine Flu Panic. (I want to say "Swine Flu Fever" but it might be confusing.) The World Health Organization (WHO) triggered the pandemic alert, which sent plans in motion across the planet. Nations ramped up their drug production capability, stockpiled flu medicines, and went on high alert.
And then… it sort of fizzled. People got sick, sure, but it was far from a 1912-style global catastrophe. What happened?