THaW researcher Kevin Fu, along with colleagues Chen Yan and Wenyuan Xu, recently released a technical report on a mysterious ailment at the United States embassy in Cuba. After exploring a wide variety of options, the trio concluded that the ailment may in fact have inadvertently been caused by interfering ultrasonic waves in the environment. Click through below to see some press coverage their discoveries have received, in addition to the full technical report.
The Conversation – Can Sound Be Used As A Weapon?
IEEE Spectrum – Finally, A Likely Explanation for the “Sonic Weapon” Used At The US Embassy In Cuba
PDF: On Cuba, Diplomats, Ultrasound, and Intermodulation Distortion
Trustworthy Health and Wellness 
a new government report concludes the effects observed by diplomats in Cuba were indeed likely caused by a directed attack. https://www.nytimes.com/2020/12/05/business/economy/havana-syndrome-microwave-attack.html