Brock Bierman, Assistant Administrator of the U.S. Agency for International Development (USAID) (R), and Dmitry Nikitenko, the first deputy general director of the N.I. Pirogov National Medical and Surgical Centre, greet each other with an elbow bump next to a U.S. Air Force C-17 Globemaster transport plane which delivered the first batch of medical aid from the United States, including 50 ventilators, at Vnukovo International Airport amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 21, 2020. REUTERS/Evgenia Novozhenina/Pool

Manuel Caceres Artesero, also known as ''Manolo El del Bombo'' (Manolo the Bass Drummer), gives an elbow bump to a person inside his bar, which is closing down, as the spread of the coronavirus disease (COVID-19) continues, in Valencia, Spain, May 18, 2020. REUTERS/Nacho Doce

U.S. Surgeon General Jerome Adams elbow bumps with U.S. International Development Finance Corporation CEO Adam Boehler during a coronavirus disease (COVID-19) pandemic response event hosted by U.S. President Donald Trump in the Rose Garden at the White House in Washington, U.S., May 15, 2020. REUTERS/Kevin Lamarque

U.S. Surgeon General Jerome Adams elbow bumps with U.S. International Development Finance Corporation CEO Adam Boehler during a coronavirus disease (COVID-19) pandemic response event hosted by U.S. President Donald Trump in the Rose Garden at the White House in Washington, U.S., May 15, 2020. REUTERS/Kevin Lamarque

U.S. Surgeon General Jerome Adams elbow bumps with U.S. International Development Finance Corporation CEO Adam Boehler during a coronavirus disease (COVID-19) pandemic response event hosted by U.S. President Donald Trump in the Rose Garden at the White House in Washington, U.S., May 15, 2020. REUTERS/Kevin Lamarque

U.S. Senator John Cornyn (R-TX) greets Marc Perrone, international president of the United Food and Commercial Workers International Union, with an elbow bump prior to the start of a Senate Judiciary Committee hearing examining liability during the coronavirus disease (COVID-19) outbreak on Capitol Hill in Washington, U.S., May 12, 2020. REUTERS/Carlos Barria/Pool

U.S. Senator John Cornyn (R-TX) greets Marc Perrone, international president of the United Food and Commercial Workers International Union, with an elbow bump prior to the start of a Senate Judiciary Committee hearing examining liability during the coronavirus disease (COVID-19) outbreak on Capitol Hill in Washington, U.S., May 12, 2020. REUTERS/Carlos Barria/Pool

U.S. Senators Richard Burr (R-NC) (R) and Sen. Tim Kaine (D-VA) greet each other with an elbow bump before the Senate Committee for Health, Education, Labor, and Pensions hearing on the coronavirus disease (COVID-19) response, in Washington, U.S., May 12, 2020. Win McNamee/Pool via REUTERS TPX IMAGES OF THE DAY

U.S. Senators Richard Burr (R-NC) (R) and Sen. Tim Kaine (D-VA) greet each other with an elbow bump before the Senate Committee for Health, Education, Labor, and Pensions hearing on the coronavirus disease (COVID-19), in Washington, U.S., May 12, 2020. Win McNamee/Pool via REUTERS

U.S. Senators Tim Kaine (D-VA) and Richard Burr (R-NC) greet each other with an elbow bump before the Senate Committee for Health, Education, Labor, and Pensions hearing on the coronavirus disease (COVID-19), in Washington, U.S., May 12, 2020. Toni L. Sandys/Pool via REUTERS

Chairman Sen. Lamar Alexander (R-TN) elbow bumps Biomedical Advanced Research and Development Authority Acting Director Dr. Gary Disbrow prior to a Senate Health Education Labor and Pensions Committee hearing on new coronavirus disease (COVID-19) tests, on Capitol Hill in Washington, U.S., May 7, 2020. Anna Moneymaker/Pool via REUTERS

Retired U.S. Coast Guard Admiral Thad Allen elbow bumps Gen. John Raymond, Space Force's first Chief of Space Operations, prior to the Senate Armed Services Committee hearing on the Department of Defense Spectrum Policy and the Impact of the Federal Communications Commission's Ligado Decision on National Security during the coronavirus disease ( COVID-19) pandemic on Capitol Hill in Washington, U.S. May 6, 2020. Greg Nash/Pool via REUTERS

Howard Smith bumps elbows after speaking with Diet Technician Debbie Nooks about his wife Lois, a 77-year-old Alzheimer's patient, at the New Paltz Center nursing facility, during a first time visit in weeks since lockdowns due to the outbreak of the coronavirus disease (COVID-19) in Pine Bush, New York, U.S., May 5, 2020. REUTERS/Caitlin Ochs

U.S. Rep. John Ratcliffe (R-TX) elbow bumps Senator Ben Sasse (R-NB) after the Senate Intelligence Committee nomination hearing, on Capitol Hill in Washington, U.S., May 5, 2020. Gabriella Demczuk/Pool via REUTERS

U.S. Rep. John Ratcliffe (R-TX) elbow bumps Chairman Sen. Richard Burr (R-NC) after the Senate Intelligence Committee nomination hearing, on Capitol Hill in Washington, U.S., May 5, 2020. Gabriella Demczuk/Pool via REUTERS

Surfers bump elbows as they protest against the nationwide lockdown regulations that allow exercise but not water activities, amid the coronavirus disease (COVID-19) outbreak, at Muizenberg beach in Cape Town, South Africa May 5, 2020 REUTERS/Mike Hutchings

Serbian President Aleksandar Vucic and Italian Ambassador to Serbia Carlo Lo Cascio touch elbows at Nikola Tesla Airport, where planes with medical supplies are set to fly to Italy to help the fight against the coronavirus disease (COVID-19) outbreak, in Belgrade, Serbia April 25, 2020. REUTERS/Marko Djurica

Wearing masks and body armor to increase the difficulty of their workout, West Point cadet Nathan Voell and Army Sgt. Logan Lewis do an elbow bump while running the steps of the Lincoln Memorial in Washington during the coronavirus disease (COVID-19) outbreak in Washington, U.S., April 24, 2020. REUTERS/Kevin Lamarque

Teacher Sergio Ferrao gives an elbow bump to student Juan Camacho at the end of the schoolday at Escuela 30, a rural school that has resumed classes after a month off due to the coronavirus disease (COVID-19), in San Jose, Uruguay April 22, 2020. REUTERS/Mariana Greif REFILE- CORRECTING TEACHER'S LAST NAME

A reporter coughs into his elbow with his face mask hanging on the seat in front of him surrounded by reporters without masks as still photographers and TV camera people wear masks during coverage of the daily coronavirus task force briefing at the White House in Washington, U.S., April 17, 2020. REUTERS/Leah Millis

Chef Jorge Cardenas shares an elbow bump with regular Ix customer Lorenzo Bernasconi outside of Ix restaurant in the Brooklyn borough of New York City, U.S., April 2, 2020 amid the coronavirus disease (COVID-19) outbreak. Picture taken April 2, 2020. REUTERS/Anna Watts

Mar 12, 2020; Ponte Vedra Beach, Florida, USA; Jon Rahm elbow bumps a caddie due to the COVID-19 Corona pandemic during the first round of the 2020 edition of The Players Championship golf tournament at TPC Sawgrass - Stadium Course. Mandatory Credit: Adam Hagy-USA TODAY Sports

A sign encourages people to use their elbow for a crosswalk button at the closed Huntington Beach Pier, as authorities encourage social distancing to prevent the spread of coronavirus disease (COVID-19) in Huntington Beach, California, U.S., March 29, 2020. Picture taken March 29, 2020. REUTERS/Patrick T. Fallon

Lisa Sauder, executive director of Bean's Cafe, and volunteer Stan Gooden-Childers do an elbow bump outside the entrance to the Ben Boeke ice arena in Anchorage, Alaska, U.S. March 23, 2020. Ben Boeke and the George M. Sullivan Arena next door have been converted to homeless shelters, with sleeping mats or cots spaced at least six feet apart in accordance with Centers for Disease Control guidelines, as protections against the spread of coronavirus disease (COVID-19). REUTERS/Yereth Rosen

First Minister Nicola Sturgeon greets one of the telephonists with an 'elbow bump' during her visit to the Scottish Government-supported Age Scotland helpline which is handling calls relating to coronavirus and its impact on the elderly, in Edinburgh, Scotland, Britain, March 18, 2020. Jane Barlow/Pool via REUTERS

John Nieckarz, 60, Cheryl Scherbarth, 70, and George Kell, 73, elbow bump while bowling at The Spanish Springs Lanes inside McCall's Tavern at Spanish Springs Town Square, amid coronavirus disease (COVID-19) cases in The Villages, Florida, U.S. March 17, 2020. REUTERS/Yana Paskova

With schools closed due to coronavirus, a boy bumps elbows with a volunteer delivering school supplies in a low income neighbourhood of Falls Church, Virginia, U.S., March 17, 2020. REUTERS/Kevin Lamarque

South Sudan's First Vice President Riek Machar uses his elbow to greet his wife and newly appointed Defence Minister Angelina Teny before her swearing-in ceremony in Juba, South Sudan March 16, 2020. REUTERS/Jok Solomun

Democratic U.S. presidential candidates former Vice President Joe Biden and Senator Bernie Sanders do an elbow bump in place of a handshake as they greet other before the start of the 11th Democratic candidates debate of the 2020 U.S. presidential campaign, held in CNN's Washington studios without an audience because of the global coronavirus pandemic, in Washington, U.S. March 15, 2020. REUTERS/Kevin Lamarque

Democratic U.S. presidential candidates former Vice President Joe Biden and Senator Bernie Sanders do an elbow bump in place of a handshake as they greet other before the start of the 11th Democratic candidates debate of the 2020 U.S. presidential campaign, held in CNN's Washington studios without an audience because of the global coronavirus pandemic, in Washington, U.S. March 15, 2020. REUTERS/Kevin Lamarque

Democratic U.S. presidential candidates former Vice President Joe Biden and Senator Bernie Sanders do an elbow bump in place of a handshake as they greet other before the start of the 11th Democratic candidates debate of the 2020 U.S. presidential campaign, held in CNN's Washington studios without an audience because of the global coronavirus pandemic, in Washington, U.S. March 15, 2020. REUTERS/Kevin Lamarque

Democratic U.S. presidential candidates former Vice President Joe Biden and Senator Bernie Sanders do an elbow bump in place of a handshake as they greet other before the start of the 11th Democratic candidates debate of the 2020 U.S. presidential campaign, held in CNN's Washington studios without an audience because of the global coronavirus pandemic, in Washington, U.S. March 15, 2020. REUTERS/Kevin Lamarque

Democratic U.S. presidential candidates former Vice President Joe Biden and Senator Bernie Sanders do an elbow bump in place of a handshake as they greet other before the start of the 11th Democratic candidates debate of the 2020 U.S. presidential campaign, held in CNN's Washington studios without an audience because of the global coronavirus pandemic, in Washington, U.S. March 15, 2020. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY

Soccer Football - Superliga Cup - Huracan v Talleres - Tomas Adolfo Duco Stadium, Buenos Aires, Argentina - March 15, 2020 Players bumping their elbows instead of shaking hands before the match played behind closed doors as the number of coronavirus cases grows worldwide REUTERS/Agustin Marcarian

Bruce Greenstein, Executive Vice President and Chief Strategy and Innovation Officer of the LHC Group offers President Donald Trump an elbow bump in place of a handshake for safety as Vice President Mike Pence and Ambassador Debbie Birx, the White House Coronavirus Response Coordinator, look on after the president declared the coronavirus pandemic a national emergency at a news conference in the Rose Garden of the White House in Washington, U.S., March 13, 2020. REUTERS/Jonathan Ernst

Bruce Greenstein, Executive Vice President and Chief Strategy and Innovation Officer of the LHC Group offers President Donald Trump an elbow bump in place of a handshake for safety as Dr Anthony Fauci and Vice President Mike Pence look on after the president declared the coronavirus pandemic a national emergency at a news conference in the Rose Garden of the White House in Washington, U.S., March 13, 2020. REUTERS/Kevin Lamarque

Bruce Greenstein, Executive Vice President and Chief Strategy and Innovation Officer of the LHC Group offers President Donald Trump an elbow bump in place of a handshake for safety as Dr Anthony Fauci and Vice President Mike Pence look on after the president declared the coronavirus pandemic a national emergency at a news conference in the Rose Garden of the White House in Washington, U.S., March 13, 2020. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY

A Taiwanese tourist wears a protective face mask, due to the coronavirus outbreak, as the other tourist wears it placed on his elbow, as they tour in downtown Ronda, Spain March 12, 2020. REUTERS/Jon Nazca

A Taiwanese tourist wears a protective face mask placed on his elbow, due to the coronavirus outbreak, as he tours in downtown Ronda, Spain March 12, 2020. REUTERS/Jon Nazca

A Taiwanese tourist wears a protective face mask placed on his elbow, due to the coronavirus outbreak, as he tours in downtown Ronda, Spain March 12, 2020. REUTERS/Jon Nazca

U.S. House Speaker Nancy Pelosi (D-CA) exchanges an elbow bump, exhibiting caution amid scoronavirus outbreak concerns at a Friends of Ireland luncheon on Capitol Hill in Washington, U.S., March 12, 2020. REUTERS/Tom Brenner

U.S. House Speaker Nancy Pelosi (D-CA) exchanges an elbow bump, exhibiting caution amid scoronavirus outbreak concerns, with Ireland's Prime Minister, Taoiseach Leo Varadkar at a Friends of Ireland luncheon on Capitol Hill in Washington, U.S., March 12, 2020. REUTERS/Tom Brenner

U.S. House Speaker Nancy Pelosi (D-CA) elbow bumps Senator Chris Coons (D-DE) following the Friends of Ireland reception on Capitol Hill in Washington, U.S., March 12, 2020. REUTERS/Tom Brenner

U.S. House Speaker Nancy Pelosi (D-CA) exchanges an elbow bump, exhibiting caution amid coronavirus concerns, with Ireland's Prime Minister, Taoiseach Leo Varadkar at a Friends of Ireland luncheon on Capitol Hill in Washington, U.S., March 12, 2020. REUTERS/Tom Brenner

U.S. House Speaker Nancy Pelosi (D-CA) exchanges an elbow bump, exhibiting caution amid coronavirus concerns, with Senate Majority Leader Mitch McConnell (R-KY) at a Friends of Ireland luncheon on Capitol Hill in Washington, U.S., March 12, 2020. REUTERS/Tom Brenner

U.S. House Speaker Nancy Pelosi (D-CA) elbow bumps Senate Majority Leader Mitch McConnell (R-KY) at a Friends of Ireland luncheon on Capitol Hill in Washington, U.S., March 12, 2020. REUTERS/Tom Brenner

Director of the Centers for Disease Control and Prevention (CDC) Dr. Robert Redfield, touches elbows with with Chairwoman of the House Government and Oversight Carolyn Maloney (D-NY) and Rep. Peter Welch (D-VT) after a hearing about coronavirus preparedness and response on Capitol Hill in Washington, U.S., March 11, 2020. REUTERS/Joshua Roberts

A doctor greets a Redmond medic with an elbow tap outside the Life Care Center of Kirkland, a long-term care facility linked to several confirmed coronavirus cases, in Kirkland, Washington, U.S. March 5, 2020. REUTERS/Lindsey Wasson ?

Governor Jay Inslee greets U.S. Vice President Mike Pence, who heads the government's coronavirus task force, with an elbow bump at Joint Base Lewis-McChord near Tacoma, Washington, U.S. March 5, 2020. REUTERS/David Ryder

Feb 27, 2020; Berkeley, California, USA; California Golden Bears guard Matt Bradley (20) holds his elbow after a play against the Colorado Buffaloes during the second half at Haas Pavilion. Mandatory Credit: Kelley L Cox-USA TODAY Sports

Feb 20, 2020; Tempe, Arizona, USA; Arizona State Sun Devils guard Remy Martin (1) reacts after being elbowed against the Oregon Ducks during the first half at Desert Financial Arena. Mandatory Credit: Joe Camporeale-USA TODAY Sports

Dec 18, 2019; Cincinnati, OH, USA; Cincinnati Bearcats guard Jaevin Cumberland (21) grabs his elbow during a stop in play as Tennessee Volunteers guard Jordan Bowden (23) walks the court in the second half at Fifth Third Arena. Mandatory Credit: Aaron Doster-USA TODAY Sports

Dec 3, 2019; Nashville, TN, USA; Nashville Predators center Ryan Johansen (92) leaves the ice after receiving a game misconduct for elbowing during the second period against the Tampa Bay Lightning at Bridgestone Arena. Mandatory Credit: Christopher Hanewinckel-USA TODAY Sports

Nov 12, 2019; Spokane, WA, USA; Gonzaga Bulldogs forward Anton Watson (22) is cut after getting an elbow from a teammate during a basketball game against the North Dakota Fighting Hawks in the second half at McCarthey Athletic Center. The Bulldogs won 97-66. Mandatory Credit: James Snook-USA TODAY Sports

Nov 12, 2019; Spokane, WA, USA; Gonzaga Bulldogs forward Anton Watson (22) is helped up after taking an elbow from a teammate during a game against the North Dakota Fighting Hawks in the second half at McCarthey Athletic Center. The Bulldogs won 97-66. Mandatory Credit: James Snook-USA TODAY Sports

Oct 25, 2019; Toronto, Ontario, CAN; San Jose Sharks defenseman Marc-Edouard Vlasic (44) takes an elbow from Toronto Maple Leafs forward Nicholas Shore (26) at Scotiabank Arena. Toronto defeated San Jose. Mandatory Credit: John E. Sokolowski-USA TODAY Sports

Rugby Union - Rugby World Cup 2019 - Quarter Final - Wales v France - Oita Stadium, Oita, Japan - October 20, 2019 France's Sebastien Vahaamahina hits Wales' Aaron Wainwright with his elbow REUTERS/Edgar Su

Rugby Union - Rugby World Cup 2019 - Quarter Final - Wales v France - Oita Stadium, Oita, Japan - October 20, 2019 France's Sebastien Vahaamahina hits Wales' Aaron Wainwright with his elbow REUTERS/Edgar Su

Rugby Union - Rugby World Cup 2019 - Quarter Final - Wales v France - Oita Stadium, Oita, Japan - October 20, 2019 France's Sebastien Vahaamahina hits Wales' Aaron Wainwright with his elbow REUTERS/Edgar Su