A new foe arose across the battlefields of WWI and went on to claim the lives of millions in a world torn apart by war. The Spanish Flu pandemic took nations by surprise and left a trail of misery in its wake.
Globally it infected more than 500 million people from soldiers to civilians, it also left between 50 and 100 million dead. See where it all began, how and where it spread, and what nations did to try to defeat this new enemy.
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