A nurse invites people to the booths to receive AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

A nurse waits to administer doses of the AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

A nurse fills a syringe with a dose of the AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

A nurse administers a dose of the AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

A nurse administers a dose of the AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

A nurse administers a dose of the AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

A nurse administers a dose of the AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

Nurses administer doses of the AstraZeneca vaccine against the coronavirus disease (COVID-19) in Belgrade, Serbia, March 25, 2021. REUTERS/Marko Djurica

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, in action. REUTERS/Benoit Tessier/File Photo TPX IMAGES OF THE DAY SEARCH "POY SPORTS" FOR THIS STORY. SEARCH "REUTERS POY" FOR ALL BEST OF 2020 PACKAGES

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts as he crosses the line. Pool via REUTERS/Christophe Ena TPX IMAGES OF THE DAY

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, in action. REUTERS/Benoit Tessier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the polka-dot jersey, celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the polka-dot jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the polka-dot jersey, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the polka-dot jersey, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, after finishing. Pool via REUTERS

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, after finishing. Pool via REUTERS

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, after finishing. Pool via REUTERS

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, after finishing. Pool via REUTERS

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, after finishing. Pool via REUTERS

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, after finishing. Pool via REUTERS

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the white jersey for best young rider, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia after the race. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia after the race. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts after finishing. Pool via REUTERS/Christophe Petit Tesson

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts after finishing. Pool via REUTERS/Christophe Petit Tesson

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts after finishing. Pool via REUTERS/Christophe Petit Tesson

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, is comforted by teammates Tom Dumoulin of the Netherlands and Wout Van Aert of Belgium after finishing. Pool via REUTERS/Christophe Petit Tesson

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts after finishing. Pool via REUTERS/Christophe Petit Tesson

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts after finishing. Pool via REUTERS/Christophe Petit Tesson

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts after finishing. Pool via REUTERS/Christophe Petit Tesson TPX IMAGES OF THE DAY

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Deceuninck-Quick Step rider Sam Bennett of Ireland, wearing the green jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Deceuninck-Quick Step rider Sam Bennett of Ireland, wearing the green jersey, celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Deceuninck-Quick Step rider Sam Bennett of Ireland, wearing the green jersey, celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Team Jumbo-Visma rider Primoz Roglic of Slovenia, wearing the overall leader's yellow jersey, reacts after finishing. Pool via REUTERS/Christophe Petit Tesson

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Marco Bertorello

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. UAE Team Emirates rider Tadej Pogacar of Slovenia, wearing the overall leader's yellow jersey, celebrates on the podium. Pool via REUTERS/Marco Bertorello TPX IMAGES OF THE DAY

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Stage winner UAE Team Emirates rider Tadej Pogacar of Slovenia on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Stage winner UAE Team Emirates rider Tadej Pogacar of Slovenia celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Stage winner UAE Team Emirates rider Tadej Pogacar of Slovenia celebrates on the podium. Pool via REUTERS/Christophe Ena

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Stage winner UAE Team Emirates rider Tadej Pogacar of Slovenia celebrates on the podium. Pool via REUTERS/Sebastien Nogier

Cycling - Tour de France - Stage 20 - Lure to La Planche des Belles Filles - France - September 19, 2020. Stage winner UAE Team Emirates rider Tadej Pogacar of Slovenia celebrates on the podium. Pool via REUTERS/Sebastien Nogier