Havana Syndrome: What We Know

U.S. officials cite numerous incidents of mysterious ailments afflicting some diplomatic and intelligence personnel

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The Havana Syndrome was first reported in diplomats stationed in Cuba in 2016.Photo: fernando medina/Reuters

Roughly 200 U.S. diplomats, intelligence officers, military officers and other government personnel, mostly based abroad, have experienced a strange and often debilitating set of symptoms, prompting a series of government and scientific investigations into what some officials have called anomalous health incidents and others refer to as attacks.

Here is a primer on what is and isn’t known.

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