US intelligence community report says 'pulsed electromagnetic energy' could cause Havana Syndrome

An interim report issued last month by a separate CIA task force examining who might be behind the episodes found that it was unlikely Russia or any other foreign adversary is conducting a widespread global campaign designed to harm US officials. But the agency also did not rule out that a nation state -- including Russia -- might be responsible for roughly two dozen cases that investigators have been unable to explain by any other known cause.

Cases 'genuine and compelling'

The scientific panel emphasized that the cases it studied were "genuine and compelling," noting that some incidents have affected multiple people in the same space and clinical samples from a few victims have shown signs of "cellular injury to the nervous system."

An executive summary of the panel's work provided new details about how the government is categorizing cases as possible Havana Syndrome, a clinically vague illness that has long frustrated firm diagnosis because victims have suffered from such a diverse array of symptoms.

Although officials declined to say how many cases the panel examined as part of its inquiry, they said they studied cases that met four "core characteristics": the acute onset of sounds or pressure, sometimes in only one ear or on one side of the head; simultaneous symptoms of vertigo, loss of balance and ear pain; "a strong sense of locality or directionality"; and the absence of any known environmental or medical conditions that could have caused the other symptoms.

Victims have reported being struck by this confluence of symptoms in embassies and personal residences around the globe, and in at least one instance, at open-air stoplight in a foreign country.

Both pulsed electromagnetic energy, "particularly in the radiofrequency range," and ultrasonic arrays could feasibly cause the four core symptoms, the panel found. Both could originate from "a concealable source." But ultrasound can't travel through walls, the panel found, "restricting its applicability to scenarios in which the source is near the target."

Sources of radiofrequency energy, on the other hand, are known to exist, "could generate the required stimulus, are concealable, and have moderate power requirements," the panel said. "Using nonstandard antennas and techniques, the signals could be propagated with low loss through air for tens to hundreds of meters, and with some loss, through most building materials."

But intelligence officials familiar with the panel's work emphasized that important information gaps remained, forestalling them from reaching firmer conclusions.

"It's frustrating but we're just as persistent to help understand and elucidate what's happening," one official said.

Part of the challenge, this person said, is that the cases not only vary, but the combination of the four core characteristics is unique in medical literature.

"When we focus on the core characteristics, it's just a unique combination that we don't have a lot of experience with in the medical and clinical fields," the official said.

And for ethical reasons, there is limited study of the impact of radiofrequency energy or ultrasound on the human body. The experts panel was limited to the accounts of people who had been exposed to either "inadvertently" and were willing to describe their symptoms.

"There is a dearth of systematic research on the effects of the relevant electromagnetic signals on humans," the executive summary of the report stated.

State Department report

A State Department commissioned report by a separate group of outside scientists, completed late last year, also began circulating Wednesday.

The JASON advisory group looked at about 200 cases, ultimately finding that about 15% of the reported incidents that they studied cannot be explained. The majority of the cases are consistent with symptoms that are caused by pathophysiological or environmental factors, the panel found, broadly confirming the CIA's assessment. The report concluded that no single mechanism that they studied can explain all of the incidents.

"JASON finds natural and credible explanations for these incidents in all but 20-30 out of the approximately 200 cases because either the incidents and symptoms fall within the realm of everyday common occurrences or the symptoms can be explained in ways that are not related to the perceived incidents," the report read.

Taken as a whole, the three sets of findings make it clear that most of the reported incidents can be explained. But the studies thus far do not present a clear picture of what is behind the incidents that remain a mystery.

Federal officials have emphasized that the findings do not signal the conclusion of the US government's efforts to get to the bottom of the mysterious health incidents.

"While this study is a valued element of the Department's efforts to understand AHI, it does not represent a conclusion to that effort: it is not a final answer. Together with our interagency colleagues, we are continuing our scientific research on the causes of AHI," Brian McKeon, the State Department's deputy secretary for management and resources, wrote to the workforce on Wednesday.

McKeon also said that the findings "do not call into question the fact that our colleagues are reporting real experiences and are suffering real symptoms."

Victory for victim's advocates

In a victory for victims' advocates, the experts panel did rule out one cause for those four characteristics: so-called psycho-social factors. Some victims have long complained that the CIA in the past had failed to take their reported symptoms seriously, brushing the cases aside as a psychosomatic episode or mass hysteria.

Those four core characteristics could not by explained by psycho-social factors "alone," the report found -- although an intelligence official explained that in some cases, a victim's symptoms might be "compounded" by a stress reaction or other psycho-social response.

The panel also ruled out "ionizing radiation, chemical and biological agents, infrasound, audible sound, ultrasound propagated over large distances, and bulk heating from electromagnetic energy."

The panel made seven recommendations, including developing better biomarkers that are "more specific and more sensitive for diagnosis and triage" of cases. It also recommended utilizing "detectors" and obtaining "devices to aid research." Details on those recommendations were heavily redacted in the panel's executive summary.

Finally, officials urged swift action by medical officials whenever a case is reported, emphasizing that individuals who have been treated immediately after an event have improved.

"I think something the employee can do to help themselves is promptly report and get medical care," the intelligence official said.

Neither the State Department nor the intelligence community report offered new clues about whether a foreign adversary might be behind the unexplained incidents.

"[I]t is not possible to conclude at this time that the events reviewed by JASON are the result of intentional attacks that cause physical harm," the State report says. "However, it is not possible, either, to rule out mechanisms that do not cause any physical harm but which might constitute harassment and lead to health conditions and functional disorders, for example through unpleasant sounds or pressure sensations."

Officials stressed that the intelligence community will continue to investigate.

"We continue to pursue complementary efforts to get to the bottom of Anomalous Health Incidents — and to deliver access to world-class care for those affected," Director for National Intelligence Avril Haines and CIA Director Bill Burns said in a joint statement. "We are making progress in both areas."