The broadcast, however, comes just days after a pair of National Institute of Health studies determined that dozens of U.S. government employees who had experienced the condition presented no consistent evidence of brain injury.

Instead, the report concluded that symptoms were likely caused by “preexisting conditions, conventional illnesses, and environmental factors,” among other things.

The Office of the Director of National Intelligence, the White House, and the FBI all reiterated to 60 Minutes in statements Sunday evening that investigating these incidents, which they refer to as anomalous health incidents (AHIs), remains a top priority for officials across the federal government.

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