A medical specialist treats patients in a ward at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A specialist receives assistance while putting on personal protective equipment (PPE) at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist works at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist works at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

Medical specialists work at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A specialist washes the floor at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist treats a patient in a ward at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

Medical specialists transport a patient at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist works at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A patient is assisted by medical specialists before receiving a CT scan at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A patient lies on a bed in a ward while receiving treatment at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist treats a patient in a ward at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist transports a patient at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist treats a patient in a ward at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

Medical specialists transport a patient at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A medical specialist works at a regional clinical hospital's unit for people suffering from the coronavirus disease (COVID-19) in Tver, Russia October 28, 2021. REUTERS/Tatyana Makeyeva

A person stands in front of an electronic screen informing of anti-COVID measures, after new restrictions were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

A man uses a mobile phone in front of an electronic screen informing of anti-COVID measures, after new restrictions were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

People walk past an electronic screen informing of anti-COVID measures, after new restrictions were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

A person holds an umbrella in front of an electronic screen informing of anti-COVID measures, after new restrictions were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

A person holds an umbrella in front of an electronic screen informing of anti-COVID measures, after new restrictions were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

People gather on a pedestrian bridge over the Moskva River at Zaryadye Park, after new measures were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), on a gloomy day in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

A view through a glass barrier shows a person walking on a pedestrian bridge over the Moskva River at Zaryadye Park, after new measures were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), near the Kremlin in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

People gather on a pedestrian bridge over the Moskva River at Zaryadye Park, after new measures were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), in central Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov

People gather on a pedestrian bridge over the Moskva River at Zaryadye Park, after new measures were imposed by local authorities to curb the spread of the coronavirus disease (COVID-19), in Moscow, Russia October 28, 2021. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY

Promotional staff perform during the Necropolis - Tanexpo 2021 international funeral exhibition in Moscow, Russia October 27, 2021. REUTERS/Evgenia Novozhenina

A promotional staff wears coffin-shaped costume at the Necropolis - Tanexpo 2021 international funeral exhibition in Moscow, Russia October 27, 2021. REUTERS/Evgenia Novozhenina

Coffins are seen on display at the Necropolis - Tanexpo 2021 international funeral exhibition in Moscow, Russia October 27, 2021. REUTERS/Evgenia Novozhenina

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong attend a joint news conference following their talks in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong shake hands at a joint news conference following their talks in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong arrive to a joint news conference following their talks in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong (not pictured) attend a joint news conference in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

South Korean Foreign Minister Chung Eui-yong and his Russian counterpart Sergei Lavrov (not pictured) attend a joint news conferene in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong shake hands at a joint news conference following their talks in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong arrive to a joint news conference following their talks in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong (not pictured) attend a joint news conference in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

South Korean Foreign Minister Chung Eui-yong and his Russian counterpart Sergei Lavrov (not pictured) attend a joint news conferene in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong attend a joint news conference following their talks in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong attend a joint news conference following their talks in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

South Korean Foreign Minister Chung Eui-yong and his Russian counterpart Sergei Lavrov (not pictured) meet in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong meet in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong (not pictured) meet in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

South Korean Foreign Minister Chung Eui-yong and his Russian counterpart Sergei Lavrov (not pictured) meet in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong meet in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong meet in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

Russian Foreign Minister Sergei Lavrov and his South Korean counterpart Chung Eui-yong meet in Moscow, Russia, October 27, 2021. REUTERS/Evgenia Novozhenina/Pool

A medical specialist browses medications at the City Clinical Hospital named after S.Botkin, where patients suffering from the coronavirus disease (COVID-19) are treated, in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

A medical specialist works in the intensive care unit (ICU) for patients suffering from the coronavirus disease (COVID-19) at the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

A medical specialist disinfects his hands in the intensive care unit (ICU) for patients suffering from the coronavirus disease (COVID-19) at the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

Medical specialists work at the City Clinical Hospital named after S.Botkin, where patients suffering from the coronavirus disease (COVID-19) are treated, in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

Lyubov Belikova, suffering from the coronavirus disease (COVID-19), sits on a bed in a ward at the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

Medical specialists work the City Clinical Hospital named after S.Botkin where patients suffering from the coronavirus disease (COVID-19) are treated in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

A medical specialist tends to a patient suffering from the coronavirus disease (COVID-19) at the intensive care unit (ICU) of the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

A medical specialist tends to a patient suffering from the coronavirus disease (COVID-19) at the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

Medical specialists treat a patient suffering from the coronavirus disease (COVID-19) at the intensive care unit (ICU) of the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

A patient suffering from the coronavirus disease (COVID-19) receives medical treatment in the intensive care unit (ICU) of the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

Medical specialists work in the intensive care unit (ICU) where patients suffering from the coronavirus disease (COVID-19) are treated at the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

Medical specialists treat patients suffering from the coronavirus disease (COVID-19) at the intensive care unit (ICU) of the City Clinical Hospital named after S.Botkin in Oryol, Russia October 26, 2021. REUTERS/Maxim Shemetov

A man dressed as an angel stands in a street amid the outbreak of the coronavirus disease (COVID-19) in Moscow, Russia October 26, 2021. REUTERS/Evgenia Novozhenina

A woman takes a picture near Red Square amid the outbreak of the coronavirus disease (COVID-19) in Moscow, Russia October 26, 2021. REUTERS/Evgenia Novozhenina