ScienceBloggers Answer: What is a Disease?

i-0f8e86ec8b2a30d740e202f3f45b4147-dice.jpgIt'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.

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