Havana syndrome is an alleged set of medical symptoms with unknown causes experienced mostly abroad by U.S. government officials and military personnel. The symptoms range in severity from pain and ringing in the ears to cognitive difficulties^[2][8] and were first reported in 2016 by U.S. and Canadian embassy staff in Havana, Cuba. Beginning in 2017, more people, including U.S. intelligence and military personnel and their families, reported having these symptoms in other places, such as China, New Delhi, India,^[9] Europe, and Washington, D.C.^[10] The cause and validity of the illness have yet to be determined.^[7][11] Source

There have been published several excellent articles about the Havana Syndrome, next to bogus articles even in the Big Media, inspired and influenced by the FBI, categorizing the Havana Syndrome as mass hysteria. The echo of the mass hysteria articles has stopped, because more and more victims talk. The best article of all, in my opinion, is the article Havana Syndrome – Embassy Intrigue, published in Die Zeit, on June 30, 2022. Reason: because of the very impressive, personal story, written with emotional and rational understanding, the unique art photos (Yannis Konstantinos), furthermore, because of the very excellent, clear, detailed and understandable description and explanation of what is experienced, when, and where. You can find it on the top of the list below.

Quote from Havana Syndrome – Embassy Intrigue, page 2:

[…] the equilibrium organ in the inner ear and the nerve connections to those areas of the brain that control balance were damaged, says Giordano. “As such, we can say with certainty that something happened to these people in Havana.” He draws a comparison to a gunshot wound: “There is no entrance wound. And no exit wound. But something happened inside that suggests an impairment of the brain.” But what?[…]

1. Havana Syndrome – Embassy Intrigue
https://www.zeit.de/zeit-magazin/leben/2022-06/havana-syndrome-us-diplomat-sonic-weapons-attack-english
Published: June 30, 2022
In: Die Zeit Nr. 27/2022
By: Bernd Eberhart and Kerstin Kohlenberg

2. The youngest victims of “Havana Syndrome”
https://www.cbsnews.com/news/havana-syndrome-children-60-minutes-2022-06-26/
Published: June 26, 2022
By: Brit McCandless Farmer, Michael Rey, Oriana Zill de Granados
In: CBS News / Sixty Minutes

3. “My brain is broken”: Former CIA analyst struggling with Havana Syndrome says she has not received promised care
https://www.cbsnews.com/news/havana-syndrome-cia-medical-care-financial-support/
Published: May 31, 2022
In: CBS News
By: Catherine Herridge

4. Symptoms reported by Canadians posted in Havana are linked with reduced white matter fibre density
https://academic.oup.com/braincomms/article/4/2/fcac053/6543087
Published: March 7, 2022
In: Oxford Academic / Brain Communications, Volume 4, Issue 2, 2022

5. Legal, financial fights mount as ‘Havana Syndrome’ goes unsolved
https://www.nbcnews.com/politics/national-security/legal-financial-fights-mount-havana-syndrome-goes-unsolved-n1286399
Published: December 22, 2021
In: NBC News
By: Josh Lederman and Brenda Breslauer

6. ‘Havana syndrome ’ and the mystery of the microwaves
https://www.bbc.com/news/world-58396698
Published: September 9, 2021
In: BBC News
By: Gordon Corera

7. What Is ‘Havana Syndrome’? More Than 100 US Personnel Sickened By Mysterious Illness
https://www.health.com/condition/rare-disorders/what-is-havana-syndrome
Published: May 19, 2021
In: Health
By: Korin Miller