A to Z Health Guide 2007

The scientific bulletin of the year may be the stem-cell breakthrough. But 2007 provided a whole alphabet of big medical news. TIME's A-to-Z guide reviews them

By Coco Masters, Alice Park, Carolyn Sayre, Tiffany Sharples, Alexandra Silver and Kate Stinchfield

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Getting the flu is never fun, but for small children it can be downright dangerous. That's why the FDA lowered its age recommendation for FluMist, the nasal-spray flu vaccine, from 5 years and older to ages 2 and up. Even as more kids get in line to be inoculated, there should be plenty of vaccines for everyone. After recent alarms over shortages, the agency expects 132 million doses of influenza vaccine to be available this winter, up 10 million from last year. The increase is in large part due to the latest addition to the immunization arsenal: Afluria was approved in September by the FDA for adults 18 and over.

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