CDC team studying toxic Ohio train derailment fell ill while investigating
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That was a month later.
As the CNN story linked in the article explains: "Because the investigators’ symptoms improved soon after they left the area, the incident was not reported to the public....
“It adds confirmation that the symptoms reported by East Palestine residents are real and are associated with environmental exposures from the derailment and chemical fire,” said David Michaels, an epidemiologist and professor at the George Washington University School of Public Health who ran the Occupational Safety and Health Administration between 2009 and 2017." https://www.cnn.com/2023/03/31/health/ohio-train-derailment-...