A warehouse staff member(L) hands out cleaning wipes to customers at the entrance of a Costco store in Vancouver, Canada, May 4, 2020. (Photos: Xinhua)

Customers wearing face masks leave a Costco store in Vancouver, Canada, May 4, 2020.

Warehouse staff members wearing face masks are seen at the entrance of a Costco store in Vancouver, Canada, May 4, 2020.