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A notice of new face covering requirements is seen during the COVID-19 outbreak at Pearson International Airport in Toronto, Canada, on April 20, 2020. Canadian Transport Minister Marc Garneau announced on April 17 a new measure to take effect on April 20, requiring all airline passengers to cover their mouths and noses with either a non-medical mask or other face covering at airport screening checkpoints. (Photo by Zou Zheng/Xinhua)
