Apple will reopen more than 25 of its branded stores in the United States this week, the company said on Sunday, continuing a steady process that has opened doors at about a quarter of its retail outlets worldwide. In March, the iPhone maker shut down all of its stores outside Greater China in response to coronavirus spread. In January it started closing down its more than 50 Greater China stores and reopening them by mid-March.

"Our dedication is to reopen our stores when we are sure the atmosphere is secure," Apple 's head of retail Deirdre O'Brien wrote in a note on the company's website on Sunday.

She said the stores will enforce social distance laws, restrict occupancy, and some will only provide curbside or storefront service.

Apple is not reporting its sales from the retail shop. Direct revenues, including retail outlets, online and corporate revenues, accounted for 31 percent of their 2019 revenue of $260 billion.

Chief Executive Tim Cook refused to include a June Quarter forecast last month, citing market uncertainty caused by the virus. First-quarter revenues in China were $9.46 billion, around $1 billion less than the same time a year ago, reflecting closures and lockdowns in that country's market.

Apple reopened its first five stores in the United States last week, forcing clients and staff to undergo temperature tests and wear masks before they reach the premises.

Apple has 510 stores around the world, and 271 stores in the USA.

The 9to5Mac website announced the company would reopen 10 of its Italian stores starting Tuesday.