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	The Brain of an Addict Addiction is a disorder with a strong genetic connection. Long-term alcohol and drug abuse can even change the structure of the brain.


	Update From the Medical Journals: October 2009 Full Commentary More Commentaries
	News Review From Harvard Medical School Trusted Harvard Medical School experts put today's health news stories in perspective and explain how issues affect you. 19 Kids Die of Swine Flu in a Week More News Review Articles
	Fun, With Less Fright Don't be haunted by tooth decay when Halloween is past. Get advice on avoiding cavities, trick-or-treat safety and more.
	Putting a Hold on Diabetes Diet, exercise and weight loss can put off diabetes for as long as 10 years among people at high risk, follow-up research finds. Read the story, a Harvard news review and more about pre-diabetes.




	Track the Flu Use our map to track the spread of the flu. (Seasonal and H1N1/swine flu.)		Ask Our Experts Harvard Medical School doctors, pharmacists and other health professionals answer your questions. Submit a question.

	Quit Smoking Learn about the many health risks of smoking. Calculate how much cash you'll save by quitting. Start your new life today!

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