CDC Alert on Ricin--South Carolina The United States Postal Service, in conjunction with federal and state law enforcement and public health officials, identified an unmarked andsealed envelope containing a threatening note and a sealed container believed to contain a toxic substance at a small postal handling facility in Greenville, South Carolina. The Department of Health and Human Services Centers for Disease Control and Prevention (CDC) confirmed that the substance was the toxin Ricin. The facility was closed and CDC conducted environmental testing. The results of the environmental testing were negative for the presence of Ricin. There are no indications of...
