The memo, along with other documents provided to military counterintelligence officials, lays out
suspected signs of the attacks from accounts of the injured, including
heat, pressure and noise. It also details
symptoms associated with the so-called Havana syndrome such as
nausea, headaches, pain and vertigo.
Crucially, defense officials emphasized, the memo, which was sent to 2.9 million military service members and Defense Department civilians, outlines how to respond: Quickly move away from the area.
(...)
“We’re going to figure it out,” he added.
(...)
There are various reasons the United States has struggled to identify who, and what, is responsible for the episodes. Officials have considered that
intelligence services from multiple countries could be involved, each with
varying motives and equipment causing the illnesses, according to some U.S. officials.
Officials stress that the possibility of
multiple adversaries remains only a theory, and that intelligence officials have yet to draw hard conclusions.
(...)
“I don’t think we can exclude
any possibility here, that there are
multiple causes of these injuries and that there are
multiple players involved in these injuries,” Mr. Schiff said. “I think
any of that is feasible.”
Pentagon Asks Personnel to Report Any Symptoms or Mysterious Ailments (NYT, Sep 15, 2021)