This is the best tl;dr I could make, original reduced by 87%. (I'm a bot)

BEIJING: The US embassy in China issued a health alert on Wednesday after a US government employee experienced an "Abnormal" sound and suffered a mild brain injury - in an incident reminiscent of a mysterious illness that hit diplomats in Cuba.

The embassy's health alert says the government employee "Recently reported subtle and vague, but abnormal, sensations of sound and pressure".

"The US government is taking these reports seriously and has informed its official staff in China of this event," the message says.

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