It's winter. And here in NYC, that means it's cold, icy, and generally miserable. Everyone I know is coughing, aching, sneezing, and blowing noses. Ten million sick readers undoubtedly want to know the answer to our latest "Ask A ScienceBlogger" question:
What is a Disease?
Four scibling responses below the fold...
Greg and John discuss how evolution changes what's classified as a "disease." Mike narrows the question down to infectious diseases. And Janet wonders how pharmaceutical advertising may affect our feelings of health.