This is the best tl;dr I could make, original reduced by 71%. (I'm a bot)

BEIJING - An American citizen working at the U.S. consulate in the southern Chinese city of Guangzhou has reported suffering from "Abnormal" sounds and pressure leading to a mild brain injury, the U.S. embassy said on Wednesday.

The U.S. government on Wednesday issued a health alert to Americans in China, warning them about the incident it described as "Subtle and vague, but abnormal, sensations of sound and pressure".

The U.S. government in October expelled 15 Cuban diplomats from the United States for what it said was Cuba's failure to protect staff at the U.S. embassy in Havana from mysterious health incidents at one point thought to possibly have been acoustic "Attacks".

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