NEW : 420 people are tested for hepatitis B , hepatitis C and HIV , health department says . Scores of W. Scott Harrington 's patients undergo tests at a Tulsa government building . A new report from the Centers for Disease Control and Prevention shows that more than half of all Americans have been infected with one or both strains of Hepatitis B. An investigation found unsanitary conditions and `` cross-contamination '' issues .
NEW : 420 people are tested for hepatitis B , hepatitis C and HIV , health department says . Scores of W. Scott Harrington 's patients undergo tests at a Tulsa government building . 7,000 patients of his patients were warned that they might have been exposed . An investigation found unsanitary conditions and `` cross-contamination '' issues .