History.com: How u.s. Cities Tried to Halt the Spread of the 1918 Spanish Flu

How U.S. city officials responded to the 1918 pandemic played a critical role in how many residents lived and died. In the late summer of 1918, the devastating second wave of the Spanish flu arrived on America's shores. Carried by World War I doughboys returning home from Europe, the newly virulent virus spread from Boston to San Francisco. the Spanish flu killed an estimated 675,000 Americans. Certain U.S. cities fared far worse than others; check out the evidence of what made the difference.