Is ‘Havana syndrome’ an ‘act of war’ or ‘mass hysteria’?

Douglas H. Smith of the Perelman School of Medicine said his team found signs of brain damage without impact to the skull in diplomats diagnosed with “Havana syndrome.” Kenneth Foster of the School of Engineering and Applied Science expressed skepticism that the condition could have been caused by a microwave weapon: “You might as well say little green men from Mars were throwing darts of energy.”

・ From The New York Times