Walmart has made it mandatory for its retail workers in U.S. counties with substantial or high transmission of coronavirus to wear masks in its stores, clubs and distribution centers, according to a memo.
The move comes as U.S. health officials said earlier this week Americans fully vaccinated against COVID-19 should go back to wearing masks in indoor public places in regions where the coronavirus is spreading rapidly.
The world's largest retailer had said in May fully vaccinated employees could work without masks.
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