U.S. President Donald Trump elbow-bumps Retired NFL football player Herschel Walker before delivering remarks on Black Economic Empowerment during an event at the Cobb Galleria Centre in Atlanta, Georgia, U.S., September 25, 2020. REUTERS/Tom Brenner

U.S. President Donald Trump elbow-bumps Retired NFL football player Herschel Walker before delivering remarks on Black Economic Empowerment during an event at the Cobb Galleria Centre in Atlanta, Georgia, U.S., September 25, 2020. REUTERS/Tom Brenner

U.S. House Speaker Nancy Pelosi (D-CA) and Senate Minority Leader Chuck Schumer (D-NY) share an elbow greeting following ceremonies honoring late U.S. Supreme Court Justice Ruth Bader Ginsburg at the U.S. Capitol in Washington, U.S., September 25, 2020. REUTERS/Jonathan Ernst/Pool

U.S. Senate Minority Leader Chuck Schumer (D-NY) shares an elbow bump with a guest following ceremonies honoring late Supreme Court Associate Justice Ruth Bader Ginsburg at the U.S. Capitol, where Ginsburg will lie in state in Statuary Hall in Washington, U.S., September 25, 2020. REUTERS/Jonathan Ernst/Pool

U.S. Democratic presidential nominee Joe Biden greets a supporter with an elbow bump at a memorial service in honor of the U.S. Supreme Court Associate Justice Ruth Bader Ginsburg, in Statuary Hall at the Capitol, Washington, U.S. on September 25, 2020. Chip Somodevilla/Pool via REUTERS

Steven T. Mnuchin, Secretary, Department of the Treasury, left, elbow bumps Jerome H. Powell, Chairman, Board of Governors of the Federal Reserve System, after the Senate's Committee on Banking, Housing, and Urban Affairs hearing examining the quarterly CARES Act report to Congress, in Washington, DC, U.S., September 24, 2020. Toni L. Sandys/Pool via REUTERS

Canada's Prime Minister Justin Trudeau greets a Senator with an elbow-bump prior to the Throne Speech in the Senate, as parliament prepares to resume in Ottawa, Ontario, Canada September 23, 2020. REUTERS/Blair Gable

Canada's Governor General Julie Payette, followed by Prime Minister Justin Trudeau, bumps elbows with Chief Justice Richard Wagner as she arrive to deliver the Throne Speech in the Senate, as parliament prepares to resume in Ottawa, Ontario, Canada September 23, 2020. REUTERS/Patrick Doyle TPX IMAGES OF THE DAY

Canada's Prime Minister Justin Trudeau shares an elbow bump with Senator Ratna Omidvar prior to the throne speech in the Senate chamber in Ottawa, Ontario, Canada September 23, 2020. Adrian Wyld/Pool via REUTERS.

Senators Patti LaBoucane-Benson (L) and Denise Batters share an elbow bump as they arrive for the throne speech in the Senate chamber in Ottawa, Ontario, Canada September 23, 2020. Adrian Wyld/Pool via REUTERS.

Canada's Governor General Julie Payette gives an elbow pump to Chief Justice Richard Wagner as she arrives with Prime Minister Justin Trudeau for the throne speech in the Senate chamber in Ottawa, Ontario, Canada September 23, 2020. Adrian Wyld/Pool via REUTERS.

House Minority Whip Steve Scalise, a Republican from Louisiana and ranking member of the House Select Subcommittee on the Coronavirus Crisis, bumps elbows with House Majority Whip James Clyburn, a Democrat from South Carolina and chairman of the House Select Subcommittee on the Coronavirus Crisis, prior to a House Select Subcommittee on the Coronavirus Crisis hearing in Washington, D.C., U.S., September 23, 2020. Stefani Reynolds/Pool via REUTERS

Acting Secretary of Homeland Security Chad Wolf bumps elbows with Senator Ted Cruz (R-TX) during the Senate Homeland Security and Governmental Affairs Committee hearing on his confirmation on Capitol Hill in Washington, U.S., September 23, 2020. Greg Nash/Pool via REUTERS

Volkswagen Group Chief Executive Officer Herbert Diess bumps elbows with Wayne Griffiths as they attend a news conference to announce Griffiths' appointment as the new president of Volkswagen's Spanish brand SEAT, in Barcelona, Spain September 23, 2020. REUTERS/Albert Gea

Volkswagen Group Chief Executive Officer Herbert Diess bumps elbows with Wayne Griffiths as they attend a news conference to announce Griffiths' appointment as the new president of Volkswagen's Spanish brand SEAT, in Barcelona, Spain September 23, 2020. REUTERS/Albert Gea

Volkswagen Group Chief Executive Officer Herbert Diess bumps elbows with Wayne Griffiths as they attend a news conference to announce Griffiths' appointment as the new president of Volkswagen's Spanish brand SEAT, in Barcelona, Spain September 23, 2020. REUTERS/Albert Gea

Democratic U.S. vice presidential nominee Senator Kamala Harris elbow bumps with a local business owner during a campaign event in Flint, Michigan, U.S., September 22, 2020. REUTERS/Emily Elconin

​​​​​​​U.S. Federal Reserve Chair Jerome Powell bumps elbows with Rep. Roger Williams (R-TX) prior to testifying before a House Financial Services Committee hearing on oversight of the Treasury Department's and Federal Reserve's coronavirus disease (COVID-19) pandemic response on Capitol Hill in Washington, U.S., September 22, 2020. REUTERS/Joshua Roberts/Pool

U.S. Federal Reserve Chair Jerome Powell bumps elbows with Rep. Roger Williams (R-TX) during a House Financial Services Committee hearing on oversight of the Treasury Department's and Federal Reserve's coronavirus disease (COVID-19) pandemic response on Capitol Hill in Washington, U.S., September 22, 2020. Caroline Brehman/Pool via REUTERS

???????U.S. Treasury Secretary Steven Mnuchin and Federal Reserve Chair Jerome Powell share an elbow bump greeting prior to testifying before a House Financial Services Committee hearing on oversight of the Treasury Department's and Federal Reserve's coronavirus disease (COVID-19) pandemic response on Capitol Hill in Washington, U.S., September 22, 2020. REUTERS/Joshua Roberts/Pool

Ukrainian Foreign Minister Dmytro Kuleba and High Representative of the European Union for Foreign Affairs and Security Policy Josep Borrell pose for a picture while greeting each other with an elbow bump instead of a traditional handshake during a news conference following their talks in Kyiv, Ukraine September 22, 2020. REUTERS/Gleb Garanich

Ukrainian Foreign Minister Dmytro Kuleba and High Representative of the European Union for Foreign Affairs and Security Policy Josep Borrell pose for a picture while greeting each other with an elbow bump instead of a traditional handshake during a news conference following their talks in Kyiv, Ukraine September 22, 2020. REUTERS/Gleb Garanich

Democratic U.S. presidential nominee and former Vice President Joe Biden gives an elbow bump to a worker as he tours Wisconsin Aluminum Foundry before delivering remarks at a campaign event in Manitowoc, Wisconsin, U.S., September 21, 2020. REUTERS/Mark Makela

Belarusian opposition leader Sviatlana Tsikhanouskaya and European Parliament President David Sassoli bump elbows, in Brussels Belgium September 21, 2020. REUTERS/Johanna Geron/Pool

Democratic U.S. presidential nominee and former Vice President Joe Biden gets elbow bump greetings from local supporters who his campaign said had voted for him for president during the first day of early 2020 general election voting in Minnesota earlier in the day, during a campaign stop in Duluth, Minnesota, U.S., September 18, 2020. REUTERS/Jonathan Ernst

Democratic U.S. presidential nominee and former Vice President Joe Biden gets an elbow bump greeting from Minnesota Governor Tim Walz as he arrives for an unscheduled outdoor campaign stop after an event in Duluth, Minnesota, U.S., September 18, 2020. REUTERS/Jonathan Ernst

Democratic U.S. presidential nominee and former Vice President Joe Biden elbow bumps a union official after speaking to union carpenters and reporters during a campaign event at the Jerry Alander Carpenter Training Center in Hermantown, a suburb of Duluth, Minnesota, U.S., September 18, 2020. REUTERS/Jonathan Ernst

German opera singer Jonas Kaufmann gives an elbow bump with a musician of the Vienna Philharmonic Orchestra on stage during the Summer Night Concert in the setting of Schoenbrunn Palace amid the coronavirus disease (COVID-19) outbreak in Vienna, Austria September 18, 2020. REUTERS/Lisi Niesner

U.S. senator Charles Schumer (D-NY) bumps elbows with members of The Broadway League at an event calling for federal funds through the "Save Our Stages" Act, to help Broadway theaters and workers out of work due the coronavirus disease (COVID-19) pandemic, in Times Square in New York, U.S., September 18, 2020. REUTERS/Mike Segar

U.S. senator Charles Schumer (D-NY) bumps elbows with Broadway actress Laura Ilene Benanti while speaking at an event with The Broadway League, calling for federal funds through the "Save Our Stages" Act, to help Broadway theaters and workers out of work due the coronavirus disease (COVID-19) pandemic, in Times Square in New York, U.S., September 18, 2020. REUTERS/Mike Segar

Swiss President Simonetta Sommaruga and Austrian Chancellor Sebastian Kurz bump elbows as they attend an official welcome ceremony at the Lohn Estate in Kehrsatz near Bern, Switzerland, September 18, 2020. REUTERS/Denis Balibouse

Swiss President Simonetta Sommaruga and Austrian Chancellor Sebastian Kurz bump elbows as they attend an official welcome ceremony at the Lohn Estate in Kehrsatz near Bern, Switzerland, September 18, 2020. REUTERS/Denis Balibouse

Swiss President Simonetta Sommaruga and Austrian Chancellor Sebastian Kurz bump elbows as they attend an official welcome ceremony at the Lohn Estate in Kehrsatz near Bern, Switzerland, September 18, 2020. REUTERS/Denis Balibouse

EU's Brexit negotiator Michel Barnier bumps elbows with European Council President Charles Michel in Brussels, Belgium September 18, 2020. REUTERS/Yves Herman/Pool

EU's Brexit negotiator Michel Barnier bumps elbows with European Council President Charles Michel in Brussels, Belgium September 18, 2020. REUTERS/Yves Herman

EU's Brexit negotiator Michel Barnier bumps elbows with European Council President Charles Michel in Brussels, Belgium September 18, 2020. REUTERS/Yves Herman/Pool

EU's Brexit negotiator Michel Barnier bumps elbows with European Council President Charles Michel in Brussels, Belgium September 18, 2020. REUTERS/Yves Herman/Pool

Wearing a face masks to reduce the risk posed by the coronavirus disease (COVID-19), Rep. John Katko (R-NY) elbow bumps Federal Bureau of Investigation Director Christopher Wray following a hearing of the House Homeland Security Committee about 'worldwide threats to the homeland' on Capitol Hill in Washington, U.S., September 17, 2020. Chip Somodevilla/Pool via REUTERS

FBI director Christopher Wray and Christopher Miller of the National Counterterrorism Center greet each other with an elbow bump before a House Homeland Security Committee hearing about 'worldwide threats to the homeland' in the Rayburn House Office Building on Capitol Hill in Washington, U.S., September 17, 2020. John McDonnell/Pool via REUTERS

Wearing masks to reduce the risk posed by the coronavirus, National Counterterrorism Center Director Christopher Miller and Federal Bureau of Investigation Director Christopher Wray greet one another with an elbow bump before testifying before the House Homeland Security Committee hearing about 'worldwide threats to the homeland' on Capitol Hill in Washington, U.S., September 17, 2020. Chip Somodevilla/Pool via REUTERS

Cypriot President Nicos Anastasiades and European Council President Charles Michel bump elbows after the news conference at the Presidential Palace in Nicosia, Cyprus September 16, 2020. REUTERS/Yiannis Kourtoglou/Pool

Cypriot President Nicos Anastasiades and European Council President Charles Michel bump elbows at the Presidential Palace in Nicosia, Cyprus September 16, 2020. REUTERS/Yiannis Kourtoglou

Cypriot President Nicos Anastasiades and European Council President Charles Michel bump elbows at the Presidential Palace in Nicosia, Cyprus September 16, 2020. REUTERS/Yiannis Kourtoglou

Democratic U.S. vice presidential nominee Senator Kamala Harris elbow bumps firefighters and forestry workers at the site of the Creek Fire in Auberry, California, U.S., September 15, 2020. REUTERS/Lucy Nicholson

U.S. Secretary of State Mike Pompeo, Cypriot President Nicos Anastasiades and Cypriot Foreign Minister Nikos Christodoulides elbow bump during their meetings at the Presidential Palace in Nicosia, Cyprus, September 12, 2020. Petros Karadjias/Pool via REUTERS

U.S. Secretary of State Mike Pompeo and Cypriot President Nicos Anastasiades elbow bump after a news conference at the Presidential Palace in Nicosia, Cyprus, September 12, 2020. Petros Karadjias/Pool via REUTERS

U.S. Secretary of State Mike Pompeo and Cypriot President Nicos Anastasiades bump elbows as Foreign Minister Nikos Christodoulides looks on, at the Presidential Palace in Nicosia, Cyprus September 12, 2020. REUTERS/Yiannis Kourtoglou

U.S. Secretary of State Mike Pompeo and Cypriot President Nicos Anastasiades bump elbows as Foreign Minister Nikos Christodoulides looks on, at the Presidential Palace in Nicosia, Cyprus September 12, 2020. REUTERS/Yiannis Kourtoglou

U.S. Secretary of State Mike Pompeo and Cypriot President Nicos Anastasiades bump elbows as Foreign Minister Nikos Christodoulides looks on, at the Presidential Palace in Nicosia, Cyprus September 12, 2020. REUTERS/Yiannis Kourtoglou

U.S. Secretary of State Mike Pompeo bumps elbow with Cypriot President Nicos Anastasiades at the Presidential Palace in Nicosia, Cyprus, September 12, 2020. Petros Karadjias/Pool via REUTERS

U.S. Secretary of State Mike Pompeo bumps elbow with Cypriot President Nicos Anastasiades at the Presidential Palace in Nicosia, Cyprus, September 12, 2020. Petros Karadjias/Pool via REUTERS

U.S. Secretary of State Mike Pompeo bumps elbow with Cypriot President Nicos Anastasiades at the Presidential Palace in Nicosia, Cyprus, September 12, 2020. Petros Karadjias/Pool via REUTERS

Executive Vice-President of the European Commission for An Economy that Works for People, Valdis Dombrovskis (L), and German Finance Minister and Vice-Chancellor Olaf Scholz bump elbows as they give a statement during the second day of the Informal Meeting of EU Ministers for Economics and Financial Affairs in Berlin, Germany September 12, 2020. Odd Andersen/Pool via REUTERS

Democratic U.S. presidential nominee and former Vice President Joe Biden elbow bumps a firefighter as he and his wife Jill deliver donuts and beer to firefighters at Shanksville fire station number 627 after visiting the nearby Flight 93 National Memorial to those killed when hijacked Flight 93 crashed into an open field on September 11, 2001, in Shanksville, Pennsylvania, September 11, 2020. REUTERS/Leah Millis

U.S. Vice President Mike Pence elbow bumps Jill Biden in greeting as her husband, Democratic presidential nominee and former Vice President Joe Biden, looks on during ceremonies marking the 19th anniversary of the September 11, 2001 attacks on the World Trade Center at the 911 Memorial & Museum in New York City, New York, U.S., September 11, 2020. REUTERS/Eduardo Munoz

U.S. Vice President Mike Pence elbow bumps Jill Biden in greeting as her husband, Democratic presidential nominee and former Vice President Joe Biden, looks on during ceremonies marking the 19th anniversary of the September 11, 2001 attacks on the World Trade Center at the 911 Memorial & Museum in New York City, New York, U.S., September 11, 2020. REUTERS/Eduardo Munoz

Opposition leader Juan Guaido bumps elbow with a health worker during a gathering with health workers amid the coronavirus disease (COVID-19) outbreak, in Caracas, Venezuela, September 10, 2020. REUTERS/Manaure Quintero TPX IMAGES OF THE DAY

Opposition leader Juan Guaido bumps elbow with a health worker during a gathering with health workers amid the coronavirus disease (COVID-19) outbreak, in Caracas, Venezuela, September 10, 2020. REUTERS/Manaure Quintero

Democratic U.S. vice presidential nominee Senator Kamala Harris bumps elbows with a man as she campaigns at a restaurant in Miami, in Florida, U.S., September 10, 2020. REUTERS/Marco Bello

Opposition leader Juan Guaido bumps elbow with a person during a gathering with health workers amid the coronavirus disease (COVID-19) outbreak, in Caracas, Venezuela, September 10, 2020. REUTERS/Manaure Quintero