What false positive cyclospora test means for outbreak, according to former FDA medical officer

The FDA is still hunting for the source of the cyclosporiasis outbreak after earlier test results proved to be a false positive. Dr. David Acheson, who has more than 40 years of medical and food safety experience, joins CBS News to discuss the issue.

The FDA is still hunting for the source of the cyclosporiasis outbreak after earlier test results proved to be a false positive. Dr. David Acheson, who has more than 40 years of medical and food safety experience, joins CBS News to discuss the issue.