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Is addiction genetic, and should it be treated like a disease?

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If the health care act recently passed by the House becomes law, it will eliminate requirements that Medicaid cover addiction treatment. In the latest installment of TODAY’s “Undercovered” series, NBC News investigative correspondent Ronan Farrow looks at a family with three generations of alcoholism to shed light on genetic predisposition to addiction and address a fundamental question: Is addiction a disease?