CDC and NTSB teams investigating Ohio train derailment fall ill and reveal potential cause.

Seven US government investigators studying the health impacts of a toxic train derailment in Ohio fell ill in early March with symptoms consistent with what some residents experienced after the February 3 derailment that released hazardous chemicals into the air, water, and soil. The cause of the investigators' symptoms is unclear, but some experts say it adds confirmation that the symptoms reported by East Palestine residents are real and associated with environmental exposures from the derailment and chemical fire. The incident was not reported to the public, but early results of a survey show that more than half of the 514 residents who have taken it so far have experienced symptoms after the derailment.