Wary, weary world slams doors shut, fearing omicron variant

A man wearing a face mask to help curb the spread of the coronavirus walks out from a shopping mall in Beijing, Monday, Nov. 29, 2021. Cases of the omicron variant of the coronavirus popped up in countries on opposite sides of the world Sunday and many governments rushed to close their borders even as scientists cautioned that it's not clear if the new variant is more alarming than other versions of the virus. (AP Photo/Andy Wong)