Blinken speaks on new efforts to investigate 'Havana syndrome'

Secretary of State Antony Blinken spoke about new efforts to investigate "Havana syndrome" from the State Department on Friday.

Secretary of State Antony Blinken on Friday spoke about efforts to investigate "Havana syndrome," the mysterious health affliction affecting dozens of U.S. personnel first identified in Cuba and now including several countries.

Blinken, in his most extensive remarks yet on the issue, said the incidents have inflicted "profound" physical and physiological harm on those impacted.

"All of us in the U.S. government, and especially with the State Department, are intently focused on getting to the bottom of what and who is causing these incidents, caring for those who have been affected and protecting our people," Blinken said.

Symptoms include headaches, dizziness, cognitive difficulties, tinnitus, vertigo and trouble with seeing, hearing or balancing. Many officials have suffered symptoms years after reporting an incident, while some have been diagnosed with traumatic brain injuries.