Cases of so-called Havana syndrome recently occurred at the US Embassy in Bogota. After they were reported jn the Wall Street Journal, Colombia's President Ivan Duque confirmed the fact to the AFP news agency. "Of course we have knowledge of this situation, but I want to leave it to the US authorities, who are doing their own investigation because it is about their own personnel," he said during a visit to New York. At least five families connected to the embassy in Colombia are said to have experienced symptoms of the mysterious syndrome. The US mission in Bogota is one of the largest in the world. In addition to career diplomats and staff, numerous intelligence agents and Drug Enforcement Administration officials are stationed there.
The puzzling syndrome first came to light in 2016, when dozens of cases were detected among US and Canadian diplomats and their family members in the Cuban capital. Those affected suffered from drowsiness, fatigue, headaches and problems with hearing and vision. Some of those afflicted even lost their hearing permanently. Since the incidents in Cuba, symptoms have been repeatedly reported by US diplomats and intelligence officials, including in Russia, China, Austria and, most recently, in Berlin. Those impacted by the phenomenon reported nausea, dizziness, severe headaches, earaches and fatigue, and some were unable to work, the Wall Street Journal wrote. US representatives with Havana syndrome have also been registered in other European countries, the newspaper reported. Some of those affected were involved with issues such as gas exports, cybersecurity and political interference, it wrote.
US intelligence coordinator Avril Haines said recently that authorities remained unsure about what is triggering the "anomalous health incidents." But conjectures abound, of course. Experts at the National Academies of Sciences, Engineering and Medicine in the US voiced one in December 2020, suggesting that targeted pulses of radio-frequency energy were behind the symptoms. Other researchers believe the Havana syndrome is caused by microwave weapons that adversaries of the US use to specifically target diplomats, intelligence officials and their families. Such weapons employing high-frequency radiation have already been developed. Microwaves operate in the range of one to 300 gigahertz. The microwave oven that many have at home heats meals at a frequency of 2.5 gigahertz. As the frequency increases, the radiation contains more energy. Using the right devices, it can be aimed at people. The rays then penetrate the body to a depth that depends on the frequency and can cause damage there. The US Department of Defense, for example, has developed a weapons system that uses microwaves at a frequency of 95 gigahertz. Another possible cause of the symptom that has been considered is sonic weapons — this thesis is supported, for example, by the fact that some Havana sufferers heard a piercing sound before their symptoms began. Other Havana syndrome patients, however, heard nothing. There could also be systems that allow attacks in the inaudible range, but little is known about these except that military officials have been researching them. So far, experts have classified their existence as highly unlikely. The question of who is responsible for the Havana syndrome is just as unclear as that of its causes. In May, US government officials, who asked not to be named, told Politico magazine that they suspected Russia's GRU military intelligence agency of being behind the attacks. The White House, however, has not officially made any accusations at this time.
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