Flu Vaccine Protects Millions Annually: CDC
40,000 hospitalizations prevented in just one year, researchers estimate

Study Reveals How New Respiratory Virus Spreads
Infectious-disease experts went to Middle East to gather information on often deadly MERS virus

Scientists Use Brain Scans to 'Read' People's Emotions
Aided by a computer, researchers say they can identify how people are feeling

Even 'Silent' Strokes Can Harm Memory, Thinking
Study found many older patients showed signs of damage, even without full-blown stroke diagnosis

Another Study Finds Colonoscopy Can Save Lives
Earlier stage of diagnosis, better survival for patients whose cancer was spotted via routine screening

Day Care May Help Kids of Depressed Moms
They showed fewer signs of emotional problems if they weren't cared for solely by their mother

Gene-Based Blood Test for Colon Cancer Shows Promise
Early trial supports accuracy of the screening, which could be a boon in preventing the disease

Stronger Statins Don't Up Kidney Injury Risk, Study Finds
Higher doses of cholesterol-fighting drugs did not increase threat among heart attack patients, researchers say

New Clues to Cancer Resistance From Long-Lived Rodents
A substance outside their cells may inhibit spread of the disease, researchers report

A Deadly Form of Diabetes That Doctors Sometimes Miss
Common signs of type 1 diabetes often resemble symptoms of other illnesses

U.S. Doctors' Group Labels Obesity a Disease
Advocates say AMA's move will boost resources to fight weight-gain epidemic, but others question decision

Many U.S. Adults Under-Vaccinated Against Whooping Cough, Survey Finds
Only 20 percent got shot within last 10 years

Character Counts When It Comes to Organ, Blood Donations
Patients prefer getting both from people with personality, behavior traits similar to their own, study finds

Lots of Americans Want Health Care Via Their Smartphone
But all too often, the demand outpaces the technology to deliver it, Harris Interactive/HealthDay poll finds

Fewer Young Americans Lack Health Care Coverage
But 45 million Americans overall still don't have health insurance

Health-Care Shoppers Still in the Dark, Study Says
Information on state websites isn't useful, researchers find

Blood Test Might Predict Type 1 Diabetes in Children, Study Finds
Evidence of two autoantibodies signaled a 70 percent risk, researchers say

MRIs Spot 'Hidden' Fungal Infections From Tainted Steroid Shots
More cases will continue to surface, study author predicts