People who have been negative in the last two nucleic acid tests line up to leave a temporary hospital converted from the National Exhibition and Convention Center to quarantine COVID-positive people in Shanghai, China on April 18, 2022. Interviews with family members of people testing positive for COVID-19, a phone call with a government health official and an independent tally raise questions about how Shanghai calculates virus cases and deaths, almost certainly resulting in a marked undercount. (Chinatopix via AP)
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