| http://www.w3.org/ns/prov#value | - The deadliest of the 10 flu pandemics that have struck the world over the last 300 years, the so-calledSpanish flu strain began as an avian influenza virus, mutated into a form that passed between humans, infected a fifth of the world's population, and killed up to 50 million people, including more than 650,000 in the United States.
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