Although the United States saw a mild flu season this year, the rise of avian flu around the world has worried federal health officials. Full Story

• Labs scramble to purge virus
• Flu season full of surprises
• Lawmaker blames FDA for vaccine shortage
• WHO warns of future pandemic | Video

Is is a cold or the flu? Recognize the symptoms for each, learn what treatments are available and get tips for avoiding both. Interactive

• Is your desk making you sick?
• Experts ponder common cold cure
• Timeline: Flu pandemics in history
• Video: If you're sick, stay home

Officials had predicted that a vaccine shortage was possible. But what's being done so it doesn't happen again? Full Story

• Interactive: How flu vaccines work
• Clean hands simple germ prevention
• Quiz: Fact vs. fiction about cold and flu
• Find flu shot clinics near you