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What is chronic fatigue syndrome (CFS)?

CFS shares symptoms with a number of other conditions including diabetes, thyroid disease, depression, anxiety, and substance abuse. The disease was not so long ago dismissed as the "yuppie flu," but it has gradually gained legitimacy and is now accepted as an established diagnosis. The Centers for Disease Control (CDC) developed a set of diagnostic criteria in 1994, and the agency has started tracking cases and reports that as many as 4 million Americans suffer from CFS.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.