Blood protects against long-gone killer 1918 flu (The Hendersonville Times-News)

Blood protects against long-gone killer 1918 flu (The Hendersonville Times-News)
WASHINGTON (AP) -- Nearly a century after history's most lethal flu faded away, survivors' bloodstreams still carry super-potent protection against the 1918 virus, demonstrating the remarkable durability of the human immune system.

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