The mystery attacks became known as the Havana syndrome and first appeared in 2016.
Speculation has centered around radiofrequency energy, a type of radiation that includes microwaves, as the culprit.
A committee of 19 experts in medicine and other fields cited "directed, pulsed energy" as the most likely reason to explain the illness.
The state department first discovered the illness that struck dozens of C.I.A. officers, first at the U.S. Embassy in Havana, and then China followed by other countries.
Complaints by victims:
Many of the officers suffered from dizziness, fatigue, headaches, and loss of hearing, memory and balance, forcing some into retirement.
The committee found the immediate symptoms that patients reported - including strange sensations of pain, pressure and sound that often appeared to come from a particular direction, or occurred in a specific spot in a room - were more consistent with a directed "attack" of radiofrequency energy.
No Action Taken
The Trump administration pretended the attacks weren't happening and dead-ended reports from the state department.
That's right. We've known for years these attacks have threatened American lives - with the latest just outside of the White House with a security official experiencing the known symptoms.
A report by the National Academies contains a stark warning about the possibility of future episodes, and the U.S. government's ability to detect them, or to mount a response.
Trump officials were pressed by lawmakers who were upset with their secrecy and their inaction. But nothing happened.
Enter Joe Biden whose taking steps to discover how to combat it, and who is responsible.
Biden's state department is currently working on the threat.
Now there's a chance we'll solve the mystery that's been so shamelessly covered up by the past administration.