U.S. restaurants will reopen with a different look. China gives clues as to how.
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QR codes
Residents in China are using QR codes to gain entry to businesses, such as restaurants; it's all part of a color-based health code system. Users sign up for the health code system and are required to enter personal information and answer a series of questions, such as previous travel, if you've had contact with a COVID-19 patient (suspected or diagnosed) and any symptoms you may be experiencing. You are then issued a
red, amber or green color. Those with a red code will have to go into self-quarantine for 14 days; amber requires a quarantine period of seven days; green means you are allowed to move around the cities. Restaurants, based on the color of your health QR code, can either let you enter or turn diners away. To read more about the system, head to CNN.
To read more see :
https://www.sfgate.com/food/slid ... e-in-the-201707.php