An illustration of rinderpest in the Netherlands in the 18th century. Europeans once feared the cattle virus as much as they did the Black Death. Jacobus Eussen/Wikimedia Commons hide caption

toggle caption Jacobus Eussen/Wikimedia Commons

Courtney Martin jogs through the snow with her dog, Theodore, in St. Louis. Missourians and their pets muddled through another frigid day Tuesday. Jeff Roberson/AP hide caption

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