A medical worker wearing protective gear transfers a COVID-19 patient from an ambulance to a hospital in Kommunarka, on the outskirts of Moscow, Russia, July 16, 2021. (Photo: Alexander Zemlianichenko Jr/Xinhua)

A medical worker wearing protective gear transfers a COVID-19 patient from an ambulance to a hospital in Kommunarka, on the outskirts of Moscow, Russia, July 16, 2021. (Photo: Alexander Zemlianichenko Jr/Xinhua)

Medical workers wearing protective gear transfer a COVID-19 patient from an ambulance to a hospital in Kommunarka, on the outskirts of Moscow, Russia, July 16, 2021. (Photo: Alexander Zemlianichenko Jr/Xinhua)

A patient, suspected of contracting the COVID-19, sits in an ambulance at a hospital in Kommunarka, on the outskirts of Moscow, Russia, July 16, 2021. (Photo: Alexander Zemlianichenko Jr/Xinhua)