Claim: The U.S. Centers for Disease Control and Prevention increased what it considers the "lethal exposure" threshold of vinyl chloride, a toxic chemical released due to the February 2023 Ohio train derailment, mere days or weeks before the incident.
Fact-check: Did CDC Raise 'Lethal Exposure' Level of Vinyl Chloride Days Before Ohio Train Derailment?
Verdict: false
Organisation: Snopes
Author: David Emery
Date published: 2023-02-24T00:56:13