The CIA has said the strange and mysterious symptoms known as Havana Syndrome are not as a the result of a sustained global campaign by a hostile power aimed at hundreds of U.S. diplomats and spies. There have been hundreds of cases involving possible symptoms of the said syndrome of which the agency now claim to have found alternative explanations in all but about two dozen cases. In the unresolved case, the agency has not been able to rule out foreign actors involvement including the original cases that began at the U.S. Embassy in Havana beginning in 2016. Instead, the Biden administration has simply termed the symptoms as 'anomalous health incidents'. The CIA has declined to comment. The CIA has said the strange and mysterious symptoms are not as a the result of a sustained global campaign by a hostile power (file photo of the lobby of the CIA in Langley, Virginia) The syndrome first surfaced at the US embassy in Havana, when government employees suddenly found themselves afflicted with the mysterious malady For several years, it had widely been accepted that the symptoms of a brain injury were being caused by Russia or some other foreign power that was deliberately targeting Americans around the world. The aim, it was believed, was in order to cause them harm or to collect intelligence. That theory has now been deemed to be completely unfounded according to sources speaking to NBC News. Those who have experienced Havana Syndrome have expressed disappointment that the Agency appears to have now dismissed the claims. Some have also suggested the CIA's findings may not be the end of the matter on the subject given that it did not coordinate with other intelligence agencies including the Defense Department. Symptoms of Havana Syndrome include loud noise, ear pain, intense head pressure or vibration, dizziness, visual problems, and cognitive difficulties What is 'Havana Syndrome'? The mysterious illness that started in the US embassy in Cuba and causes memory and hearing loss The problem has been labeled the 'Havana Syndrome,' because the first cases affected personnel in 2016 at the U.S. Embassy in Cuba. At least 200 cases across the government are now under investigation. People who are believed to have been affected have reported headaches, dizziness and symptoms consistent with concussions, with some requiring months of medical treatment. Some have reported hearing a loud noise before the sudden onset of symptoms. Countries its been reported in: Cuba, United States, China, Russia, Vietnam, Austria, Germany, Serbia, United Kingdom, Georgia, Poland, Taiwan, Australia, Colombia, Kyrgyzstan, and Uzbekistan Symptoms include: -hearing loss -severe headaches -memory issues -dizziness -brain injury Advertisement There are still calls for more research to take place into what may have happened despite the ruling out of hundreds of cases. 'Even two dozen cases is a lot of cases if Americans were attacked,' one person who was briefed on the findings said. Symptoms of Havana Syndrome include loud noise, ear pain, intense head pressure or vibration, dizziness, visual problems, and cognitive difficulties, and many still continue to experience these or other health problems, according to a 2020 National Academies of Sciences, Engineering, and Medicine report. The report assessed the symptoms to be 'consistent with the effects of directed, pulsed radio frequency (RF) energy.' Some have reported hearing a loud noise before the sudden onset of symptoms. But it's unclear if victims sustain any neurological damage or any longterm damage and it's unclear what might have caused that damage. U.S. intelligence officials once points the blame at Russia in what they believed to have been deliberate attacks on diplomats and CIA officers working abroad. But in the three years since that time, spy agencies have not found enough evidence that would pinpoint the cause or culprits behind the incidents. The 2020 report details how observed brain injuries were consistent with the effects of directed microwave energy, which the report also said that Russia had long been studying. Russia has consistently denied any involvement. It leaves scientists and government officials puzzled about certain about who might have been behind the attacks which started in late 2016. It's know known if the symptoms could have been caused inadvertently by surveillance equipment - or if the incidents were caused by a mysterious sonic weapon. Some doubt its existence, however, and call it 'mass hysteria.' The leading theory behind the cause of the suddenly surfaced syndrome starts with a device that scientists say Russia could have invented during the Cold War, which was later used to spy on US embassies by collecting data from laptops and cell phones. However, experts now theorize that a hostile country - like Russia or China - may have turned this microwave technology into a weapon. Both countries deny any involvement in any of the incidents relating to the mysterious syndrome and U.S. officials now say they cannot say for sure that the attacks were intentional attacks or the result of human activity. At least one of the three American serving at the consulate in Geneva (pictured) believed to be inflicted had to be medevacked from Switzerland to the U.S. for treatment in a 2021 incident In private, the CIA Director William Burns had described the various as 'attacks' yet he together with the director of national intelligence, Avril Haines, have endorsed the latest reports findings. There are likely to be more reports on Havana syndrome in the coming months. The White House National Security Council has put together a task force that is examining Havana Syndrome and it it is expected to report shortly. The Defense Department, FBI and the State Department are also working on their own investigations as to the origins of the syndrome. In the latest incidents, three US diplomats in Geneva and one in Paris were afflicted with the suspected syndrome. Last summer, four officials serving at U.S. diplomatic missions in Geneva and Paris also came down with ailments linked to 'Havana Syndrome. A similar incident occurred in Paris, where senior embassy officials informed diplomats and encouraged others to report any unusual symptoms (U.S. Embassy in Paris pictured) Of the three American officials serving at the consulate in Geneva, at least one had to be medevacked from Switzerland to the U.S. for treatment, the Wall Street Journal reported. Staff were later informed about the incident by the mission's leadership during a town hall meeting. This was followed by a similar incident in Paris, where senior embassy officials informed diplomats via email about a suspected case, encouraging others to report any unusual symptoms. In response to the new reported incidents U.S. Secretary of State Antony Blinken said the entire federal government is working to get to the bottom of the illness. 'To date, we don't know exactly what's happened and we don't know exactly who is responsible,' Blinken said last month. 'I've heard them. I've listened to them. You can't help but be struck by how these incidents disrupted their lives and their well-being. We're doing everything we can to care for them.' The sonic weapon the could cause Havana syndrome is said to be a smaller version of this 1990s Soviet microwave generator, which is kept at the University of New Mexico The incidents in Geneva and Paris took place where the U.S and Russia held security talks in early December over Moscow's troop buildup near the Ukraine border. Blinken said the United States has raised the illnesses with the Russians but still cannot make a determination about who was responsible. The Secretary of State added he has met with State Department employees around the world who described the illnesses and how these incidents disrupted their lives. 'There is no doubt in my mind that people have been directly and powerfully affected,' he said. 'We are working overtime across the entire government to get to the bottom of what happened, who's responsible. And in the meantime to make sure that we're caring for anyone who's been affected and to protect all of our people to the best of our ability,' he added. The European incidents now add to the list of roughly 200 reported cases of the yet unexplained illness, colloquially named for its first reported case in 2016 at the US Embassy in Havana, Cuba. Almost half of the cases involved CIA officers or their relatives, nearly 60 have been linked to Department of Defense workers or relatives, and about 50 involved State Department. In October, three Havana Syndrome sufferers came forward to share the agonizing symptoms of the disease, with two of them claiming it left them brain damaged and destroyed their promising diplomatic careers. Tina Onefur, Kate Husband, and Husband's partner Doug Ferguson were all working for the US State Department, stationed in Cuba's capital, when they found themselves afflicted with the mysterious malady. The syndrome first surfaced at the embassy in Havana in 2016 - months before Onefur, Husband, and Ferguson were diagnosed. The three described their debilitating symptoms - which include hearing loss, severe headaches, memory issues, dizziness, grogginess and even brain damage - in detail during an interview with NBC News last year. Onefur, sobbed as she spoke and recalling the fact she can now only work two hours a day from home due to doctor-diagnosed brain damage, and said she was washing dishes one night in March 2017 at her home in Havana when she suddenly found herself overcome with pain. 'The kids were upstairs playing, and I was standing at the kitchen window, and all of a sudden I felt like I was being struck with something.' When asked what the sensation felt like, Onefur said the pain was like nothing she had ever felt before in her life, and explained, 'It was gripping - it was like I'd been seized by some invisible hand, and I couldn't move.' When asked by interviewer Andrea Mitchell how her health is today, Onefur, choking back tears revealed that her symptoms were still as strong and prevalent as ever, even after more than four years. 'It's not easy to talk about our health because it's an invisible injury,' Onefur said, 'It's four-and-a-half years of of excruciating headaches, it's four-and-a-half years of stumbling losing my balance, four-and-a-half years of vision degradation,' Onefur asserts of the illness, while breaking down in tears. In a nearby neighborhood in Havana in the winter months of 2016, Kate Husband and Doug Ferguson were working in the US embassy by day, with their nights spent together at their shared home. But nights for the couple - who both hail from Michigan - would often be strangely interrupted, by a high-pitched, piercing noise seemingly coming from their backyard. 'It was persistent, kind of at the same level all the time,' Husband said of the shrill sound, which they never managed to identify, adding it was 'very, very loud' and 'nothing you can sit with.' Ferguson, however, managed to capture the mysterious noise on his phone and played it back for Mitchell during the interview. The sound on the recording - a high-frequency ringing that somewhat resembles a dog whistle - is strikingly similar to a sound previously released by AP in a 2017 covering the then just-surfaced syndrome. When asked if any other people in her neighborhood had heard the same sounds and was afflicted with similar symptoms, Husband said they had. After feeling a slew of symptoms in the coming months, the couple was later examined by neurologists at the University of Pennsylvania. In early 2017, Ferguson was cleared to go back to work, but Husband was diagnosed with brain damage by doctors, and was subsequently sent to receive treatment. Husband told Mitchell that during the diagnosis, a doctor told her, after analyzing scans of her brain, 'it's like you aged 20, 25 years all at once.' She later retired from her work for the State Department on the grounds of a medical disability. Husband further revealed during the interview that she still suffers from balance issues associated with the brain damage she suffered after the 2017 diagnosis - a sensation that would trigger violent bouts of nausea, and a fogginess that makes even the most basic tasks difficult. All rights reserved for this news site (dailymail) and under his responsibility