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In the 1980s Hiroaki Ota, a Japanese psychiatrist working in Paris, identified a rare condition suffered by some Japanese visitors who were disappointed by the French capital. The peculiar disorder, whose symptoms include hallucinations, anxiety and dizziness, was dubbed pari shōkōgun. “Paris syndrome” has been eradicated this year, owing to the near-total shutdown of international travel. But for many city residents confronted by local prices, the palpitations and eye-rubbing persist.

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