This year’s influenza vaccine in the United States contains three strains of the influenza virus. Last March, experts at the U.S. Centers for Disease Control and Prevention (CDC) and the World Health Organization chose those strains based on the varieties of flu virus that were present at the end of North America’s flu season.
The decision [...]

Just months after contaminated spinach causes grave diarrhea, another outbreak. What is E. coli O157:H7, and why is it so dangerous? Got any bright ideas for constraining this killer bug?

Edible vaccines offer cheap, easy solution to halt disease in developing countries, but roadblocks remain. Is this an acceptable type of gene-modified food?

New treatments, new understandings offer new hope for Alzheimer’s disease.