2/29/08: A class action lawsuit has been filed against a surgical center believed to have spread hepatitis C by reusing syringes and vials of medication.

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March 4: A clinic may have infected a handful of patients with hepatitis C, but health officials say about 40,000 more should be tested for the disease. NBC's Dr. Nancy Snyderman reports.

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Feb. 29: About 40,000 people are being told they may have been exposed to Hepatitis at a Nevada medical clinic. NBC's Jinah Kim reports.

Sloppy practices at a health clinic may have put thousands at risk for hepatitis and HIV. CNN's Elizabeth Cohen reports.

Nancy Grace investigates a clinic that allegedly put 40,000 patients at risk for HIV, Hepatitis B and C.