"Sonic Attacks" at the US Embassy in Cuba - Mass Hysteria?

[I believe you]

The other theory I have is WOOD ALCOHOL poisoning, I say it because of the syntoms and this is almost normal in Cuba.

 

[Trailspotter]

On the Science magazine site this week:
http://www.sciencemag.org/news/2017...apon-sickened-us-diplomats-cuba-panel-asserts

Diplomats at the U.S. embassy in Havana suffered a range of unexplained symptoms.

ALEXANDRE MENEGHINI/REUTERS/NEWSCOM
Stressful conditions, not ‘sonic weapon,’ sickened U.S diplomats, Cuba panel asserts
By Richard StoneDec. 5, 2017 , 3:20 PM

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[pony]

Another report has just come out about this;

"Brain abnormalities found in victims of US embassy attack in Cuba. Mysterious attacks that harmed 24 Americans in Havana resulted in changes to white matter tracts in brain, doctors say"

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https://www.theguardian.com/world/2017/dec/06/us-embassy-attack-cuba-brain-abnormalities-victims

 

[M Bornong]

I'd like to know how many of the injured showed this damage?

Medical testing has revealed the embassy workers developed changes to the white matter tracts that let different parts of the brain communicate, several U.S. officials said, describing a growing consensus held by university and government physicians researching the attacks. White matter acts like information highways between brain cells.

Loud, mysterious sounds followed by hearing loss and ear-ringing had led investigators to suspect “sonic attacks.” But officials are now carefully avoiding that term. The sounds may have been the byproduct of something else that caused damage, said three U.S. officials briefed on the investigation. They weren’t authorized to discuss it publicly and demanded anonymity.

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https://www.apnews.com/bbed1d7f6f1a...y-brain-abnormalities-in-Cuba-attack-patients

 

[Mick West]

https://www.theguardian.com/world/2017/dec/06/us-embassy-attack-cuba-brain-abnormalities-victims

Doctors still do not know how victims ended up with the white matter changes, or how exactly those changes might relate to their symptoms. US officials would not say whether the changes were found in all 24 patients.

Acoustic waves have never been shown to alter the brain’s white matter tracts, said Elisa Konofagou, a biomedical engineering professor at Columbia University who is not involved in the government’s investigation.

“I would be very surprised,” Konofagou said, adding that ultrasound in the brain is used frequently in modern medicine. “We never see white matter tract problems.”

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[Mick West]

It's all rather vague:

Medical testing has revealed the embassy workers developed changes to the white matter tracts that let different parts of the brain communicate, several U.S. officials said

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So what are "changes" to white matter? Is a "change" the same as "damage"? How is it measured? What are they comparing it against? Your white matter "changes" when you learn a new skill (like music, or juggling) or are simply exposed to novel situations.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3201847/

Learning involves changes in strength of synapses, the connections between neurons in gray matter. But human brain imaging using magnetic resonance imaging (MRI) has revealed structural changes in white matter after learning complex tasks. This raises the question of whether white matter responds to experience in a manner that affects neuron function under normal circumstances, thereby affecting information processing and performance. There are a few intriguing observations related to this possibility. For example, structural changes in white matter correlate with the number of hours a professional musician practices (1). The greatest changes were seen in parts of the brain that were not yet fully myelinated. Similarly, adult subjects showed increased white matter structural organization in a brain region important for visuo-motor control 6 week after learning to juggle (2). And in a study of adults learning to read, the volume, anatomical organization, and functional connectivity of white matter tracts linking cortical regions important for reading were increased (3). Whether these changes in white matter structure affect neuron function directly by altering transmission of information required for acquiring a skill is not clear. However, the observations do show that learning a new skill is associated with altered white matter structure in the mature brain.

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It's very hard to say without any context or numbers. It's also very hard without comparison to another similar population. It might even be impossible, as many of the symptoms, even including changes in white matter, might after arisen in some cases due simply to the idea that they were being zapped, and the intense worry and scrutiny that came thereafter.

 

[pony]

https://www.theguardian.com/world/2017/aug/09/cuba-embassy-diplomats-expelled-washington

Considering that these incidents in Cuba left "US officials there with physical symptoms that one official said includes potentially permanent hearing loss", I would assume that any alteration would lean more towards "damage" than "change."

Also from the article above, "In the autumn [of 2016], officials said the affected diplomats and their spouses began to experience symptoms of hearing loss so severe and puzzling that an investigation was launched, and it was determined that they were at risk. They were allowed to leave Cuba, the officials said.

No children were affected, but at least some of the adults who were are believed to have suffered permanent hearing loss, according to the officials."

These seem like serious ailments, and not something that is usually attributed to learning to juggle. I know how to juggle. I never once lost my hearing because of learning to juggle.

 

[deirdre]

as many of the symptoms, even including changes in white matter, might after arisen in some cases due simply to the idea that they were being zapped, and the intense worry and scrutiny that came thereafter.

yup. Changes are noted in PTSD. Besides, how would they know what the white matter looked like BEFORE the alleged sound incidents? Are brain scans required for all employees?

 

[Mick West]

These seem like serious ailments, and not something that is usually attributed to learning to juggle. I know how to juggle. I never once lost my hearing because of learning to juggle.

That's not the point. They detected " changes to the white matter tracts". They did not say what the nature of that change was, nor did they correlate it with the people who had hearing loss

 

[Trailspotter]

More on Cuban panel conclusion in Science magazine today:
http://science.sciencemag.org/content/358/6368/1236.full

Cuban panel claims stress caused mystery illnesses
Richard Stone
Science 08 Dec 2017:
Vol. 358, Issue 6368, pp. 1236-1237
DOI: 10.1126/science.358.6368.1236

After a 9-month probe hampered by lack of access to medical records, a panel of Cuban scientists this week declared that U.S. diplomats here likely suffered a “collective psychogenic disorder” earlier this year, not the deliberate “health attack” that the U.S. Department of State has claimed.

Based on media reports about the mysterious symptoms, including hearing loss, nausea, vertigo, and memory lapses, some U.S. scientists had already reached similar conclusions. Stanley Fahn, a neurologist at Columbia University who has seen a summary of the Cuban report, agrees that “it could certainly all be psychogenic.” That a panel appointed by the Cuban government dismisses the U.S. claims may not be surprising, and the Federal Bureau of Investigation is still leading what State Department officials have described as a “vigorous” multiagency investigation. But the Cuban report summary, obtained by Science, reveals intriguing details. For instance, a high-frequency noise that some had identified as a possible “sonic weapon” may have been crickets chirping.

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[Mick West]

Interesting, I'd missed the "cicada" theory, but it actually got reported back on Oct 27 on Cuban TV:


0:47


And in fact it was described as "similar to cicadas", presumably by the people who heard it, well before that, like in the 14 Sept 2017 Guardian article:
https://www.theguardian.com/world/2...-weapon-attacks-at-us-embassy-in-cuba-deepens

Some felt vibrations, and heard sounds – loud ringing or a high-pitch chirping similar to crickets or cicadas. Others heard the grinding noise. Some victims awoke with ringing in their ears and fumbled for their alarm clocks, only to discover the ringing stopped when they moved away from their beds.

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We have Cicadas here, and they do indeed have a bizzare high-pitched noise that's very difficult to locate. The noise varies from a grating buzz to a high pitched whine. Here's a high pitched one:
Source: https://www.youtube.com/watch?v=bu2TunA2Pyw


And a close up, somewhat different sound:
Source: https://www.youtube.com/watch?v=b3PRkwixQnQ


Part of the difficulty to tracking a single cicada (a trait shared by crickets and frogs) is that they tend to stop when you move - combined with the non-directional nature of the sound means you have to move a bit, wait, then see it it got louder. I once spent half an hour tracking one that was just 40 feet away.

So what it a couple of the cases were just people with a cicada in their room?

A huge problem here is discounting of explanations because they do not apply to all case, combined with taking aspects from one case (like a clinical diagnosis of "brain damage") and applying it to all cases.

 

[Mick West]

Mixed messages in congress:

http://www.nydailynews.com/news/wor...evidence-sonic-attacks-cuba-article-1.3741448

Republican Sen. Jeff Flake says the U.S. has found no evidence that American diplomats in Havana were the victims of attacks with an unknown weapon.
...
“The Cuban Interior Ministry is saying the FBI has told them there is no evidence of a sonic attack, even though that term is being used, attack, there is no evidence of it,” Flake told the AP. “There’s no evidence that somebody purposefully tried to harm somebody. Nobody is saying that these people didn’t experience some event, but there’s no evidence that that was a deliberate attack by somebody, either the Cubans or anybody else.

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http://www.star-telegram.com/news/politics-government/article193435779.html

WASHINGTON


Sen. Marco Rubio pushed back Sunday against comments from a Republican colleague that the United States has found no evidence of “sonic attacks” in Cuba.

The Florida Republican charged the attacks were a “documented fact.”

In a series of tweets Sunday, Rubio dismissed comments by Sen. Jeff Flake of Arizona, a longtime advocate for improving ties with Cuba, stating that any U.S. official briefed on the mysterious events in Havana “knows full well that while method of attack still in question, that attacks and injuries occurred isn’t.”

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So Rubio still says it's "an attack", just maybe not a sonic one.

 

[Robert Bartholomew]

I am not in the habit of posting to online blogs, but in coming across this one, I have to say, the remarks by Mick West are very insightful and informative. I have just posted an updated assessment of the 'sonic attack' episode on my Psychology Today Blog, after watching the Hearings by the Senate Foreign Relations Committee.

https://www.psychologytoday.com/blo...tack-not-mass-hysteria-says-top-doc-hes-wrong

Take away the 'mild brain trauma' and 'white matter track changes' - both of which did not happen to everyone,and you are dealing with a small sample size to begin with, and you have a classic textbook case of mass psychogenic illness. Many common conditions can cause white matter changes. As for concussion symptoms, this is an odd medical description. I remain confident that this is mass psychogenic illness.

Dr. Robert E. Bartholomew

 

[DasKleineTeilchen]

So what it a couple of the cases were just people with a cicada in their room?

or directly under their bed? and cicadas can be really loud! imagine them in a nearly closed room with reflective walls and there is no wonder that someone gets confused by that noise.

when you were last time with joe rogan on his podcast and he'd played that soundsample, my first thought was "oh, sounds almost like a bad recording from a cicada".

 

[DasKleineTeilchen]

So Rubio still says it's "an attack", just maybe not a sonic one.

I think thats a political choice.

 

[Henry Crun]

Suggestion that the effect was caused by intermodulation distortion between two ultrasound devices used for (for example) motion detection or eavesdropping.

https://www.thedailybeast.com/did-these-computer-scientists-solve-the-cuban-sonic-attack

A technical report from the University of Michigan offers a stunningly simple theory for the source of the Cuban “sonic attack”: a pair of eavesdropping devices too close to each other and tripping the ultrasound that ironically was supposed to make their presence quiet.

More importantly, it might not have been done with malicious intent.

“It doesn’t prove it’s the cause,” Kevin Fu, an associate professor at the University of Michigan and one of the co-authors of the study, cautioned. “It’s a correlation. But to us, it seems like a strong correlation.”

Looks like a study of the ages of people who were affected could be useful, with older people less sensitive to high audio frequencies.

 

[Abe]

A new theory emerges:

https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html

Strikes with microwaves, some experts now argue, more plausibly explain reports of painful sounds, ills and traumas than do other possible culprits — sonic attacks, viral infections and contagious anxiety.​

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​

This theory seems fairly compelling. I would have liked the NYT to interview a skeptical scientist or two, though.

 

[Mick West]

NBC News follows up on the microwave theory, pointing the finger at Russia:

https://www.nbcnews.com/news/latin-...-mystery-attacks-diplomats-cuba-china-n908141

U.S. officials suspect Russia in mystery 'attacks' on diplomats in Cuba, China
Josh Lederman, Courtney Kube, Abigail Williams and Ken Dilanian / Sep.11.2018 / 1:42 AM ET

The suspicion that Russia is likely behind the alleged attacks is backed up by evidence from communications intercepts, known in the spy world as signals intelligence, amassed during a lengthy and ongoing investigation involving the FBI, the CIA and other U.S. agencies. The officials declined to elaborate on the nature of the intelligence.

The evidence is not yet conclusive enough, however, for the U.S. to formally assign blame to Moscow for incidents that started in late 2016 and have continued in 2018, causing a major rupture in U.S.-Cuba relations.

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The state department remains convinced these are real attacks.

The incidents appear to have stopped over winter, when cicadas don't sing, and resumed in the spring.

[/ex]By September 2017, it appeared the attacks had stopped. But then new incidents were reported in April and May of 2018, leading to two new confirmed cases.

One of the new cases, a worker sent to Havana on temporary assignment to fill a vacancy, was hit within just a few hours of arriving in the country, two individuals briefed on the incident told NBC News[/ex]

The "Russia did it" theory takes a hit with incidents in China:

Around the same time, in May, the State Department disclosed that a worker posted to the U.S. Consulate in Guangzhou, China, had also reported unexplained sounds and then been diagnosed with brain injury and symptoms consistent with the Cuba cases. It's unclear how firmly U.S. evidence indicating Russia was behind the Cuba cases extends to China, where the investigation is still in the early stages.

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So I'm still going with mass hysteria as my #1 explanation. When they say "diagnosed with brain injury and symptoms consistent with the Cuba cases" this sounds just like the usual constellation of symptoms that everyone has from normal life and getting older. Hearing loss, vision changes, fatigue, aches and pains, etc. Someone hears a buzzzing from a cicada or some electrical equipment or something. They are worried about energy beam attacks, they tell someone, a doctor asks them if their hearing has changed, they think about and notice a slight ringing in their ears which has always been there, but not noticed until now. Same with other symptoms.

 

[DasKleineTeilchen]

So I'm still going with mass hysteria as my #1 explanation.

and that seems about right; a new paper strongly suggests a very loud cricket-species searching for mates:

On Friday, two scientists presented evidence that those sounds were not so mysterious after all. They were made by crickets, the researchers concluded...“There’s plenty of debate in the medical community over what, if any, physical damage there is to these individuals,” said Mr. Stubbs in a phone interview. “All I can say fairly definitively is that the A.P.-released recording is of a cricket, and we think we know what species it is.”

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https://www.nytimes.com/2019/01/04/science/sonic-attack-cuba-crickets.html

paper:

https://www.biorxiv.org/content/early/2019/01/04/510834

 

[Wickbyrne]

Hello all,

First time poster but I have been fascinated by this story.

https://edition.cnn.com/2019/01/30/americas/canada-cuba-diplomat-ill/index.html

The Canadian statement said that after the last confirmed case of unusual health symptoms in November 2018, a number of Canadian diplomatic staff in Cuba underwent additional medical testing.

Read More
"These tests confirm that an additional employee has symptoms consistent with those of previously affected employees. This brings the total number of affected Canadian employees, spouses and dependents to 14."

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This latest person went to the embassy late last year.

I have a few questions and was curious if anyone can answer.

Can Mass hysteria affect one person elsewhere? How would that work in the China case?

No interview with the person but here is the mother's interview

When Werner’s health worsened, her mother grew so alarmed that she quickly flew to China. She arrived and set about buying new air filters and imported food and water, thinking the city’s pollution may have been harming her daughter’s health. Nothing worked.

Then Laura started experiencing the sounds and sensations, too.

“We heard a very high-pitched sound in Catherine’s bedroom. And we heard a very low, pulsing sound in the living room,” Hughes said. “Our heads would pulse. You would feel like you would want to regurgitate. You could become instantly paralyzed, instantaneously fatigued.”

Both Hughes and her daughter also believed they were being surveilled, having noticed signs that their apartment had been broken into. Hughes said they’d discover lights turned on that had been left off, or furniture and other items moved around in obvious signs of an intrusion.

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https://tichronicles.com/2018/11/22/mother-of-u-s-diplomat-hurt-in-health-attack-speaks-out/

Unsure if this was mentioned in forum (there was another incident reported in Uzbekistan which was quickly shut down by the State department but the reporter still stands by that reporting.

Just as another very hypothetical question - could the actual sound if the cicada actually be used as the actual weapon - if there was some way of directing the sound at the people?

Thank you for your discussions above

 

[Wickbyrne]

The Havana Syndrome Part 1: Why Canadian diplomats have accused their government of abandoning them

The reported managed to interview in anonymity 3 of the diplomats and a brief review of what they experienced

As a silly aside - there seems to be mention of ultimate frisbee a few times - is that truly a thing for diplomats.

Diplomat Allen is first mentioned and the build up to the interview in the article starts

This is what happened to them though I will state the the first line below mentions winter of 2017 - according to my timeline I have that should be 2016 as if begins round there and also makes sense with what the diplomat says below

In the late winter of 2017 the previously healthy members of the Allen family began experiencing symptoms, from nosebleeds to headaches, that they couldn’t explain.

They would wake up with excruciating headaches. They experienced nausea and vision problems.

Their youngest son, 12, was getting as many as four nosebleeds a day, even passing out. Mrs. Allen began hearing high-pitched noises. The couple became uncharacteristically irritable.

“We knew there was something, but we just couldn’t figure out what was going on.”

And then, one evening in early April, there was a knock on their door. An American diplomat who lived across the street asked if Allen would go for a walk. “Living in Cuba, we understood that our houses were bugged.”

What Allen learned shook him.

His neighbour told him a dozen Americans had already been evacuated from Havana after suffering from symptoms including nausea, headaches, nosebleeds, hearing and eye problems.

He told Allen the symptoms were believed to be the result of attacks with some kind of a weapon, maybe sonic.

“It just hit me, ‘Holy crap, this is going on in my house.’”
...

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There is a little more saying that the children were told to stay in Canada whilst Allen and wife came back

Diplomat Davies

Diplomat Davies, his wife and their two young children were having strange experiences in their nearby Havana house during the spring and summer of 2017.

Early in the year, their young daughter began having difficulty concentrating at school. She suffered from nausea, tinnitus, sensitivity to light, visual impairment, and, like the Allen children, sudden nosebleeds, sometimes in the middle of the night.

Mrs. Davies had complained about hearing high-pitched sounds. Then, during a game of ultimate Frisbee with American and Canadian diplomats in a local park, Mrs. Davies suddenly fell to the ground.

“I no longer knew where was up and where was down,” she told her concerned husband of the fall.

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Mrs. Davies was diagnosed as having damage to her vestibular system and is hypersensitive to light and noise, suffered from headaches, dizziness and muscle twitching that would last for days. She has to wear special glasses because of sensitivity to light which is similar to the mother of the diplomat from China.

Diplomat Baker

Diplomat Baker, who was posted to Havana with her two young children, began experiencing symptoms of Havana syndrome in early 2017, including tinnitus, headaches and vertigo. Her elementary school aged daughter was nauseous, had headaches and heavy nosebleeds.

Baker underwent medical testing that confirmed balance and vestibular issues and suggested the need for further investigation early in 2017, but was told follow up testing would not take place for months.

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That is a bit more detail; about what the people experienced. I'll talk more about Part 2 in next post

https://ottawacitizen.com/news/nati...havana-how-a-dream-posting-became-a-nightmare

 

[Wickbyrne]

Havana Syndrome, Part 2: How a dog’s brain may help solve the mystery of Canadian diplomats’ Cuban nightmare

To me this is more interesting. Initially there is talk about the brain injury that was diagnosed - now I know that that topic is a bit contentious. In the article they talk to Michael Hoffer

Again he is adamant that

It is not crickets.

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Diplomat Allen had three Shih Tzu dogs and this is the bit that I am more intrigued by

During the summer of 2017, before the family returned to Ottawa, their were behaving strangely, said Allen. Almost every night, the dogs would run to the corner of their yard backing on to a house where American diplomatic staff lived and bark frantically, for no apparent reason. “There was nothing there.”

The dogs were shipped back to Ottawa after the family returned. One of them, a seven-year-old, subsequently began behaving strangely — suddenly biting at non-existent flies, arching its back and lying on its back and putting its feet in the air. A veterinarian diagnosed seizures and told the family there was something wrong with the dog’s brain. The vet recommended the dog be euthanized.

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To me and this is my personal opinion - this ties in to the Chinese incident. In the interview with the female diplomat's mother she mentions that her dogs were also seemingly affected.

To conclude there is a little more re the diplomats

MRIs show bleeds coming from small capillaries in their brains, he said, which are completely different from the control group. “For us, this is the concrete evidence we needed that this was real.”

Canadian diplomats and families have also been diagnosed with vestibular and vision disorders, cognitive disorders and other issues.

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Now I do have some figures which state the percentages of those that still have permanent effects but I need to find that study first I think before I start throwing numbers at you.

Unsure if this helps or just muddies the waters more and I hope I haven't made any errors

https://ottawacitizen.com/news/loca...mystery-of-canadian-diplomats-cuban-nightmare

 

[Wickbyrne]

Finally this is more what i have taken from the above and would like clarity on

My understanding from the interviews is that it would seem that most thought they were the only ones affected. So can different people start experiencing these similar effects in isolation? I know that mass hysteria fits and the more likely answer though the diplomats dispute this as do those that have studied them. But can this hysteria happen in that way or do you interpret what they say differently?

What about the dogs? I must admit I focus on this perhaps too much but the dogs being seemingly affected would indicate to me something else but again i'm no expert in this and if there are other studies that suggest otherwise that would be interesting.

The biological side - I know that the americans didn't send in the CDC untii very late - August 16th according to what I have found (think this was mentioned in a cspan hearing)

Unsure about the Canadian side of things - but are their any biological (molds, etc) that could account for these sort of symptoms?

Finally just to touch upon the more fantastical side of it - does this lean more towards the strangely side of the story or less to you?

Kind Regards

Thanks for the patience
Wick

 

[Mick West]

Kids get nosebleeds (which can run in the family.) People experience health problems as they got older. Shitzus have seizures.

To an individual, their health problems are very significant, and they want to ascribe a significant cause to them. But a series of anecdotes is not evidence of some kind of coordinated attack.

 

[David Coulter]

There is an interesting analysis of this in the NYT today (18/5/19). https://nyti.ms/2JnhN3r

"Mass hysteria" is not an accepted term by the neurology experts - it is called "functional disorder".

A couple of quotes summarize discussions in this thread:

If it is hard to understand how a mysterious psychological and neurological process could have sickened a group of previously healthy diplomats, it turns out to be even harder to understand how invisible weapons could have done so.

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and

Ric Tell, a former chief of the Electromagnetics Branch of the Environmental Protection Agency, has spent more than 50 years studying and helping to set international standards on safe exposure limits to electromagnetic radiation, including microwave radiation. “If a guy is standing in front of a high-powered radio antenna — and it’s got to be high, really high — then he could experience his body getting warmer,” Tell told me. “But to cause brain-tissue damage, you would have to impart enough energy to heat it up to the point where it’s cooking. I don’t know how you could do that, especially if you were trying to transmit through a wall. It’s just not plausible.”

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[Z.W. Wolf]

People tend to think of "radiation" in intuitive terms; or, really, feel about it in an intuitive way. It's simply something bad. Associated with sickness. Like black magic, it causes you to get sick in mysterious ways.

In analytical terms microwave radiation is non-ionizing , and could not cause capillary or cell damage... unless you were literally cooking. Your flesh would literally have to be heated to over 200 degrees. You would notice.

But what about ionizing radiation? Could there be an X-ray or Gamma ray weapon? I don't know. But the whole scenario doesn't seem plausible to me.

More down to Earth, these symptoms sound a lot like tick or mosquito borne encephalitis, which wouldn't be surprising in a place like Cuba. If not that, how about a half a hundred other tropical diseases, parasites, molds, and whatever.

 

[Z.W. Wolf]

During the summer of 2017, before the family returned to Ottawa, their were behaving strangely, said Allen. Almost every night, the dogs would run to the corner of their yard backing on to a house where American diplomatic staff lived and bark frantically, for no apparent reason. “There was nothing there.”

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Little yappy dogs barking incessantly for no reason. Wow, that is strange.

 

[Gib]

Some of the symptoms sound like hangovers. Too many embassy functions?

 

[Agent K]

"Havana syndrome: Exposure to neurotoxin may have been cause, study suggests"
https://www.cbc.ca/news/canada/havana-syndrome-neurotoxin-enqu-te-1.5288609

According to a new Canadian study, obtained exclusively by Radio-Canada's investigative TV program Enquête, the cause could instead be neurotoxic agents used in pesticide fumigation...
The symptoms experienced by the diplomats and their families, rather, are consistent with low-dose exposure, leading researchers to examine the effects of cholinesterase (ChE) blockers in commercial products...
The researchers found that since 2016, Cuba launched an aggressive campaign against mosquitoes to stop the spread of the Zika virus. The embassies actively sprayed in offices, as well as inside and outside diplomatic residences — sometimes five times more frequently than usual. Many times, spraying operations were carried out every two weeks, according to embassy records.
Toxicological analysis of the Canadian victims confirmed the presence of pyrethroid and organophosphate — two compounds found in fumigation products.
There was also a correlation between the individuals most affected by the symptoms and the number of fumigations that were performed at their residence...
Cindy Calkin, a psychiatrist and member of the multidisciplinary research team, said she categorically rejects the idea of mass hysteria. "I have interviewed all but one or two of [the victims] and I haven't found any evidence of psychiatric disorder. This is a very strong group, very resilient and there is no evidence of mass hysteria," she said. "Part of the diagnostic of mass hysteria is that there is no underlying other medical cause that can be found. And we [found] underlying medical evidence...
The researchers are now looking to collaborate with Cuban officials to determine whether any Cubans suffered similar brain injuries, as their study only focused on Canadian individuals.

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[Mick West]

A detailed article on the current state of the story. Basically, there seems to be considerable dispute, with many people claiming the government is not taking things seriously enough, along with claims of political maneuvering.

https://www.nytimes.com/2020/10/19/us/politics/diplomat-attacks-havana-syndrome.html

U.S. Diplomats and Spies Battle Trump Administration Over Suspected Attacks
By Ana Swanson, Edward Wong and Julian E. Barnes
Oct. 19, 2020, 7:31 p.m. ET

One of the biggest questions centers on whether Trump administration officials believe that Mr. Lenzi and other diplomats in China experienced the same mysterious affliction as dozens of diplomats and spies at the American Embassy in Cuba in 2016 and 2017, which came to be known as Havana Syndrome. American employees in the two countries reported hearing strange sounds, followed by headaches, dizziness, blurred vision and memory loss.
But the government’s treatment of the episodes has been radically different. The State Department, which oversaw the cases, has produced inconsistent assessments of patients and events, ignored outside medical diagnoses and withheld basic information from Congress, a New York Times investigation found.
...
The C.I.A. director remains unconvinced, and State Department leaders say they have not settled on a cause.

Critics say disparities in how the officers were treated stemmed from diplomatic and political considerations, including the president’s desire to strengthen relations with Russia and win a trade deal with China.
...
“These injuries, and subsequent treatment by the U.S. government, have been a living nightmare for these dedicated public servants and their families,” said Senator Jeanne Shaheen, Democrat of New Hampshire. “It’s obvious how a U.S. adversary would have much to gain from the disorder, distress and division that has followed.”

Dr. David A. Relman, a Stanford University professor who is the chairman of the National Academies of Sciences committee that examined the cases, said it was “disheartening and immensely frustrating” that the State Department had refused to share the report with the public or Congress “for reasons that elude us.”

In a statement, the department said “the safety and security of U.S. personnel, their families and U.S. citizens is our top priority. The U.S. government has not yet determined a cause or an actor.”
...
The situation has been complicated by the fact that American officials and scientists still debate whether the symptoms resulted from an attack.

Many diplomats, C.I.A. officers and scientists suspect a weapon producing microwave radiation damaged the victims’ brains. But some scientists and government officials argue it was a psychological illness that spread in the stressful environment of foreign missions. Some point to chemical agents, like pesticides.

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