2020年12月22日，星期二，加拿大首席公共卫生官谭咏诗博士在渥太华举行的新冠疫情新闻发布会上发言。THE CANADIAN PRESS/Justin Tang
Chief Public Health Officer of Canada Dr. Theresa Tam speaks during a news conference on the COVID-19 pandemic in Ottawa on Tuesday, Dec. 22, 2020. THE CANADIAN PRESS/Justin Tang
加拿大首席公共卫生官谭咏诗博士在渥太华举行的新冠疫情新闻发布会上发言
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