“For months, the C.I.A. and government scientists have been working to find a cause of the chronic ailments reported by intelligence officers and diplomats — but the health incidents, known as the Havana syndrome, remain as mysterious now as they were a year ago,” the New York Times reports.
“Intelligence officials have not found any hard evidence that points to a cause. There are no intelligence intercepts implicating an adversarial spy service. No one has detected microwaves, other readings of energy pulses or any other weapons that could be to blame.”

