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It's not just this source; the FBI also formally reported to Senate Foreign Relations that there was no evidence of any "sonic attack". The FBI had medical professionals examining the patients directly. That's presumably the story behind the timing of this story.

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It's also totally possible for the actual reason to be neither a targeted attack nor mass hysteria. The FBI's conclusion is evidence against the attack scenario, but it doesn't specifically elevate the hysteria hypothesis over everything else.

I prefer to remain skeptical of diagnoses that are advanced by someone with no actual patient contact and appear to be geared more towards self-promotion (talking to the press) than helping the patients.

So what caused 'mild traumatic brain injuries'? Mass hysteria?

Yes, or, more specifically, stress. Mild TBI is diagnosed primarily through patient-reported symptoms, and is notoriously hard to confirm with imaging.

Exactly. People working overseas, under stress, start experiencing symptoms and read about these "attacks" happening. And start freaking out that maybe they're a victim too.

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