it's ridiculous propaganda, as has been shown multiple times
https://rumble.com/v4n2avw-glenn-debunks-60-minutes-havana-syndrome-propaganda.html

also by empire media.
https://www.thetimes.com/world/us-world/article/what-if-havana-syndrome-is-all-in-the-mind-zdhkvphnr?region=global

and empire's own propaganda, now

Even CNN noted that the people affected were FORCED to participate in a US medical study before they had these symptoms - https://edition.cnn.com/2024/08/30/health/nih-havana-syndrome-study/index.html

Part of the general hysteria of our times. When your milk spoils in your fridge, that's also the Russians' fault.