How common is this stuff?

https://www.nbcdfw.com/news/local/aisd-jr-high-plagued-by-mystery-illnesses-reopens-with-upgrades-and-renovations/35511/

https://www.nytimes.com/2019/02/07/world/canada/havana-syndrome-canada.html

hoping this wasn't early 5g deployment .. transmitters could be hidden. sounds crazy but that's where i'm at in terms of plausibility currently