A bartender prepares a cocktail as usually crowded Moments bar nearly emptied after restaurants and cafes start request QR codes of vaccination or a negative coronavirus test in Moscow, Russia, Monday, June 28, 2021. Restaurants and cafes in Moscow on Monday began requesting that patrons provide proof of vaccination or a negative coronavirus test as the Russian capital faces a surge of new infections. As proof of vaccination for entering a restaurant, customers must visit a government website and get a QR code, a digital pattern designed to be read by a scanner. (AP Photo/Pavel Golovkin)

Medical workers carry a patient suspected of having coronavirus on a stretcher at a hospital in Kommunarka, outside Moscow, Russia, Saturday, June 26, 2021. Russia on Saturday reported its highest daily COVID-19 death toll of the year as the country grapples with a sharp spike in infections that has brought new restrictions in some regions. The national coronavirus task force said 619 people died over the past day, the most since Dec. 24. There were were 21,665 new infection cases, nearly 1,300 more than on the previous day and more than double the 9,500 reported on June 1. (AP Photo/Alexander Zemlianichenko)

Medical workers carry a patient suspected of having coronavirus on a stretcher at a hospital in Kommunarka, outside Moscow, Russia, Saturday, June 26, 2021. Russia on Saturday reported its highest daily COVID-19 death toll of the year as the country grapples with a sharp spike in infections that has brought new restrictions in some regions. The national coronavirus task force said 619 people died over the past day, the most since Dec. 24. There were were 21,665 new infection cases, nearly 1,300 more than on the previous day and more than double the 9,500 reported on June 1. (AP Photo/Alexander Zemlianichenko)

A bartender folds napkins as usually crowded Moments bar emptied after restaurants and cafes start request QR codes of vaccination or a negative coronavirus test in Moscow, Russia, Monday, June 28, 2021. Restaurants and cafes in Moscow on Monday began requesting that patrons provide proof of vaccination or a negative coronavirus test as the Russian capital faces a surge of new infections. As proof of vaccination for entering a restaurant, customers must visit a government website and get a QR code, a digital pattern designed to be read by a scanner. (AP Photo/Pavel Golovkin)

A bartender serves a cocktail as usually crowded Moments bar nearly emptied after restaurants and cafes start request QR codes of vaccination or a negative coronavirus test in Moscow, Russia, Monday, June 28, 2021. Restaurants and cafes in Moscow on Monday began requesting that patrons provide proof of vaccination or a negative coronavirus test as the Russian capital faces a surge of new infections. As proof of vaccination for entering a restaurant, customers must visit a government website and get a QR code, a digital pattern designed to be read by a scanner. (AP Photo/Pavel Golovkin)

A waiter serves customers outside the Moments bar as they haven't got QR codes of vaccination or a negative coronavirus test in Moscow, Russia, Monday, June 28, 2021. Restaurants and cafes in Moscow on Monday began requesting that patrons provide proof of vaccination or a negative coronavirus test as the Russian capital faces a surge of new infections. As proof of vaccination for entering a restaurant, customers must visit a government website and get a QR code, a digital pattern designed to be read by a scanner. (AP Photo/Pavel Golovkin)

Medical workers carry a patient suspected of having coronavirus on a stretcher at a hospital in Kommunarka, outside Moscow, Russia, Saturday, June 26, 2021. Russia on Saturday reported its highest daily COVID-19 death toll of the year as the country grapples with a sharp spike in infections that has brought new restrictions in some regions. (AP Photo/Alexander Zemlianichenko)

A waiter serves customers outside the Moments bar as they haven't got QR codes of vaccination or a negative coronavirus test in Moscow, Russia, Monday, June 28, 2021. Restaurants and cafes in Moscow on Monday began requesting that patrons provide proof of vaccination or a negative coronavirus test as the Russian capital faces a surge of new infections. As proof of vaccination for entering a restaurant, customers must visit a government website and get a QR code, a digital pattern designed to be read by a scanner. (AP Photo/Pavel Golovkin)

Medical workers carry a patient suspected of having coronavirus on a stretcher at a hospital in Kommunarka, outside Moscow, Russia, Saturday, June 26, 2021. Russia on Saturday reported its highest daily COVID-19 death toll of the year as the country grapples with a sharp spike in infections that has brought new restrictions in some regions. The national coronavirus task force said 619 people died over the past day, the most since Dec. 24. There were were 21,665 new infection cases, nearly 1,300 more than on the previous day and more than double the 9,500 reported on June 1. (AP Photo/Alexander Zemlianichenko)

A bartender waits for customers as usually crowded Moments bar emptied after restaurants and cafes start request QR codes of vaccination or a negative coronavirus test in Moscow, Russia, Monday, June 28, 2021. Restaurants and cafes in Moscow on Monday began requesting that patrons provide proof of vaccination or a negative coronavirus test as the Russian capital faces a surge of new infections. As proof of vaccination for entering a restaurant, customers must visit a government website and get a QR code, a digital pattern designed to be read by a scanner. (AP Photo/Pavel Golovkin)