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A staff member wearing a face mask and a face shield checks a man's appointment information at the entrance of a COVID-19 immunization clinic at the Metro Toronto Convention Center (MTCC) in Toronto, Ontario, Canada, on Jan. 18, 2021. Ontario's first proof-of-concept COVID-19 immunization clinic opened here on Monday to help develop a blueprint for how shots could be administered in non-medical settings. (Photo by Zou Zheng/Xinhua)