TUESDAY, April 5 (HealthDay News) -- Over the last two decades teen births have dropped 37 percent in the United States and are now at a record low, government health officials report.
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BBC News - Swine flu offers extraordinary super immunity
People who recover from swine flu may be left with an extraordinary natural ability to fight off flu viruses, findings suggests.
In the nine patients they studied who had caught swine flu during the pandemic, they found the infection...