U.S. Diplomats in Geneva, Paris Struck with Suspected ‘Havana Syndrome’

This video interviews people who have suffered under the 'Havana Syndrome'

https://www.nbcnews.com/politics/national-security/legal-fin...

Now this is a scary disease. Any suspicions to the cause? Poisoning? Directed EM fields? Common health threat we weren't aware of?

An attack with microwaves wouldn't be that new, I believe there were some occurrences.

I've read one report from CBC said that this is caused by using some kind of detergent, or sanitizer.