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China’s travel lockdown sharply slowed the global spread of Covid-19
https://www.technologyreview.com/f/615333/china-wuhan-coronavirus-quarantine-slowed-global-spread/?truid=e6a9a97f971519b8818ba7420a6d576d&utm_source=the_download&utm_medium=email&utm_campaign=the_download.unpaid.engagement&utm_content=03-09-2020
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