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Yong-Pin Zhou
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Vaccination mandates on domestic flights are not an omicron solution. Here’s a better idea | Opinion

Arturo Estrada Rodriguez
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Never Mind Toys, It’s Time to Ask Santa for Crutches and Catheters

Dongyuan Zhan
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Why COVID-19 herd immunity now looks unattainable: Sheldon H. Jacobson

Nasrin Yousefi 
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Claire Holloway
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Kimon Drakopoulos
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Why does it still take so long to get a COVID-19 PCR test result?