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A woman wearing a face mask walks along a street in Lisbon, Sunday, Dec. 26, 2021. Due to the spread of the omicron strain, Portuguese authorities brought forward what they have presented as a "week of containment." Effective from Sunday and at least until Jan. 9, working from home becomes mandatory for non-essential employees and a negative COVID-19 test result must be shown to enter cinemas, theaters, sports events, weddings and baptisms. (AP Photo/Armando Franca)