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FILE - In this Jan. 27, 2021, file photo, Yvonne Gibbs, 72, receives Moderna's COVID-19 vaccine, at the TCF Center in Detroit. COVID-19 hit Detroit hard. Michigan, which not long ago had one of the country's lowest COVID-19 infection rates, is confronting an alarming spike that some experts worry could be a harbinger nationally. While vaccinations in Michigan are helping to protect senior citizens and other vulnerable people, the upswing is boosting hospitalizations among younger adults and threatening in-person instruction at schools. (AP Photo/Carlos Osorio, File)