CIAWASHINGTON, Feb. 3 officials could be external influence in the form of pulses of electromagnetic energy or ultrasound, according to declassified expert material. The United States has been struggling with the mystery of «anomalous health incidents» for five years, which were first recorded by diplomats in Cuba and then repeated in other parts of the planet, but so far no one has been held responsible for them. «The signs and symptoms of anomalous health incidents are genuine and convincing… The set of signs cannot be easily explained by known environmental factors or medical conditions, they may be associated with external influences,» the conclusion says. intelligence community experts, which was published by the CIA and the office of the US Director of National Intelligence. Electromagnetic energy pulses, especially in radio frequencies range, as well as ultrasound, but only at short distances, plausibly explain the main characteristics of the phenomenon, in contrast to ionizing radiation, chemical and biological agents, infrasound or audible sound, experts say. Manifestations of the «Havana syndrome» — dizziness, nausea, headaches and hearing problems – first seen among U.S. diplomats in Cuba in 2016 and 2017, and in China in 2018. The media later reported similar incidents among US diplomats, intelligence officials, and other government officials in Vienna, Africa, Tajikistan, and Russia. According to CIA chief William Burns, a total of several hundred people were affected by the «Havana Syndrome». «Havana Syndrome»
