[HIGHLIGHTS] Mysterious “Havana Syndrome” plagues secret services: The West is powerless against Putin's invisible weapon

Mysterious “Havana Syndrome” plagues secret services: The West is powerless against Putin's invisible weapon. The symptoms: a throbbing headache, persistent nausea and dizziness.

The phenomenon was first discovered in Havana by a CIA employee. In Guangzhou, China, a US diplomat was hit. Then Shanghai, Belgrade and Berlin. All over the world, the Kremlin appears to have tried to disrupt US activities. The syndrome has been causing trouble since at least 2016. And the symptoms can sometimes last for years.