Blood of 1918 Flu Survivors Still Protects Against Long-Gone Killer

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WASHINGTON -- 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.

Scientists tested the blood of 32 people ages 92 to 102 who were exposed to the 1918 pandemic flu and found antibodies that still roam the body looking to strangle the old flu strain. Researchers manipulated those antibodies into a vaccine and found that it kept alive all the mice they had injected with the killer flu, according to a study published online Sunday in the journal Nature.

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Blood of 1918 Flu Survivors Still Protects Against Long-Gone Killer

There's no pressing need for a 1918 flu vaccine because the virus has long since mutated out of its deadly form and is extremely un...

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