A healthcare worker and a North Dakota National Guard member help process COVID-19 test samples at a drive-thru testing site inside the Bismarck Event Center as the coronavirus disease (COVID-19) outbreak continues in Bismarck, North Dakota, U.S., October 26, 2020. REUTERS/Bing Guan

A military healthcare worker takes a swab sample as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker holds a tube for swab samples, as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker holds a tube for swab samples, as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker holds a tube for swab samples next to a military man, as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker prepares a tube for a swab sample as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker takes a swab sample from a man as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

People wait in their cars for a military healthcare worker to take a swab sample at one of the biggest coronavirus disease (COVID-19) testing centres in the country, opened up by Italian military, while Italy grapples with a growing number of cases, in Rome, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker takes a swab sample as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker takes a swab sample as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A military healthcare worker takes a swab sample from a person as Italian military open up one of the biggest coronavirus disease (COVID-19) testing centres in Italy while the country grapples with a growing number of cases, in Rome, Italy, October 26, 2020. REUTERS/Yara Nardi

A medical worker collects a swab sample from a man to be tested for the coronavirus outside a clinic in Kajang, Malaysia October 26, 2020. REUTERS/Lim Huey Teng 

A North Dakota resident seals a self-administered COVID-19 saliva test sample at a testing site inside the former Thomas Edison Elementary School, as the coronavirus disease (COVID-19) outbreak continues in Moorhead, Minnesota, U.S., October 25, 2020. REUTERS/Bing Guan

A healthcare worker wearing a protective gear collects blood sample from a man, who has recovered from the coronavirus disease (COVID-19), during a plasma donation camp inside a classroom at a slum in Mumbai, India, July 24, 2020. REUTERS/Hemanshi Kamani

A person holds a number before having a swab sample taken at a COVID-19 testing site as the spread of the coronavirus disease (COVID-19) continues, in Nizna, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

A healthcare worker collects a swab sample from a person at a COVID-19 testing site as the spread of the coronavirus disease (COVID-19) continues, in Nizna, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

A healthcare worker collects a swab sample from a person at a COVID-19 testing site as the spread of the coronavirus disease (COVID-19) continues, in Nizna, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

A test sample is seen at a COVID-19 testing site at the municipal office as the spread of the coronavirus disease (COVID-19) continues, in Oravsky Podzamok, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

A healthcare worker collects a swab sample from a person at a COVID-19 testing site at the municipal office as the spread of the coronavirus disease (COVID-19) continues, in Oravsky Podzamok, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

A healthcare worker collects a swab sample from a person at a COVID-19 testing site at the municipal office as the spread of the coronavirus disease (COVID-19) continues, in Oravsky Podzamok, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

A man reacts as a healthcare worker collects a swab sample at a COVID-19 testing site at the municipal office as the spread of the coronavirus disease (COVID-19) continues, in Oravsky Podzamok, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

Personnel in personal protective equipment (PPE) arrange tests samples at a COVID-19 testing site in a primary school as the spread of the coronavirus disease (COVID-19) continues, in Dolny Kubin, Slovakia October 23, 2020. REUTERS/Radovan Stoklasa

A sign supporting U.S. President Donald Trump and sample concrete walls are seen outside a Wieser Concrete manufacturing facility in Menomonie, Wisconsin, U.S., October 22, 2020. REUTERS/Bing Guan

A healthcare worker wearing personal protective equipment (PPE) takes a swab sample from a woman for the coronavirus disease (COVID-19) test at the Alvaro Obregon Park in Mexico October 21, 2020. Picture taken October 21, 2020. REUTERS/Henry Romero

A healthcare worker wearing personal protective equipment (PPE) holds a swab sample taken a woman for the coronavirus disease (COVID-19) test at the Alvaro Obregon Park in Mexico October 21, 2020. Picture taken October 21, 2020. REUTERS/Henry Romero

A healthcare worker wearing personal protective equipment (PPE) takes a swab sample from a woman for the coronavirus disease (COVID-19) test at the Alvaro Obregon Park in Mexico October 21, 2020. Picture taken October 21, 2020. REUTERS/Henry Romero

A healthcare worker wearing personal protective equipment (PPE) take some test tubes after administering samples from people at a temporary testing site for the coronavirus disease (COVID-19) test at the Alvaro Obregon Park in Mexico October 21, 2020. Picture taken October 21, 2020. REUTERS/Henry Romero

A healthcare worker wearing personal protective equipment (PPE) takes a swab sample from a woman for the coronavirus disease (COVID-19) test at the Coyoacan Park in Mexico October 21, 2020. Picture taken October 21, 2020. REUTERS/Henry Romero

A healthcare worker wearing personal protective equipment (PPE) takes a swab sample from a woman for the coronavirus disease (COVID-19) test at the Jardin de las Artes Graficas Park in Mexico City, Mexico October 22, 2020. REUTERS/Henry Romero

People wait in line before healthcare worker take samples for the coronavirus disease (COVID-19) test at Coayoacan park, in Mexico City, Mexico October 22, 2020. REUTERS/Henry Romero

A healthcare worker wearing personal protective equipment (PPE) takes a swab sample from a woman for the coronavirus disease (COVID-19) test at the Jardin de las Artes Graficas Park in Mexico City, Mexico October 22, 2020. REUTERS/Henry Romero

A healthcare worker wearing personal protective equipment (PPE) takes a swab sample from a man for the coronavirus disease (COVID-19) test at the Jardin de las Artes Graficas Park in Mexico City, Mexico October 22, 2020. REUTERS/Henry Romero

Certified nursing assistants (CNAs) Jermaine LeFlore and Shameka Johnson (right, in NFL Green Bay Packers apparel) process nasal swab samples at a drive-thru testing site outside the Southside Health Center as the coronavirus disease (COVID-19) outbreak continues in Milwaukee, Wisconsin, U.S., October 21, 2020. REUTERS/Bing Guan

U.S. National Guard Cpl. Kyle Zahn of the 157th Maneuver Enhancement Brigade, physician assistant (PA) Harrison Pham, and certified nursing assistants (CNAs) Jermaine LeFlare and Shameka Johnson process nasal swab samples at a drive-thru testing site outside the Southside Health Center as the coronavirus disease (COVID-19) outbreak continues in Milwaukee, Wisconsin, U.S., October 21, 2020. REUTERS/Bing Guan

Medical worker collects a swab sample from a child to be tested for the coronavirus in Petaling Jaya, Malaysia October 21, 2020. REUTERS/Lim Huey Teng TPX IMAGES OF THE DAY

Medical workers wearing personal protective equipment collect swab samples from people to be tested for the coronavirus in Petaling Jaya, Malaysia October 21, 2020. REUTERS/Lim Huey Teng

Medical worker collects a swab sample from a woman to be tested for the coronavirus in Petaling Jaya, Malaysia October 21, 2020. REUTERS/Lim Huey Teng

A nurse wearing a protective suit and a face mask holds nose swab samples at a testing site as the spread of the coronavirus disease (COVID-19) continues, in Brussels, Belgium October 21, 2020. REUTERS/Francois Lenoir

A medical staff member wearing a protective suit waits for people who will be tested for the coronavirus disease (COVID-19) in front of a recently opened sampling station inside of closed music club in Prague, Czech Republic, October 20, 2020. REUTERS/David W Cerny

A medical staff member wearing a protective suit waits for people who will be tested for the coronavirus disease (COVID-19) in front of a recently opened sampling station inside of closed music club in Prague, Czech Republic, October 20, 2020. REUTERS/David W Cerny

A medical staff member wearing a protective suit waits for people who will be tested for the coronavirus disease (COVID-19) in front of a recently opened sampling station inside of closed music club in Prague, Czech Republic, October 20, 2020. REUTERS/David W Cerny

A medical staff member wearing a protective suit waits for people who will be tested for the coronavirus disease (COVID-19) in front of a recently opened sampling station inside of closed music club in Prague, Czech Republic, October 20, 2020. REUTERS/David W Cerny

A medical staff member wearing a protective suit waits for people who will be tested for the coronavirus disease (COVID-19) in front of a recently opened sampling station inside of closed music club in Prague, Czech Republic, October 20, 2020. REUTERS/David W Cerny

Madrid Emergency Service (SUMMA) UVI-8 unit's nurse Elena Tena holds a swab sample taken from a patient amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, October 19, 2020. Picture taken October 19, 2020. REUTERS/Juan Medina

Madrid Emergency Service (SUMMA) UVI-8 unit's nurse Elena Tena and medical resident Mireya Nadal take a swab sample from Leoncia, 86, in her home amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, October 19, 2020. Picture taken October 19, 2020. REUTERS/Juan Medina

Florida resident Floyd Jenkins shows his sample ballot while waiting in line at the Hiawassee Library polling station as early voting begins ahead of the election in Orlando, Florida, U.S. October 19, 2020. REUTERS/Octavio Jones

An employee of a pharmacy puts a swab sample for a PCR (polymerase chain reaction) coronavirus test in a tube at a pharmacy in Zurich, Switzerland October 19, 2020. REUTERS/Arnd Wiegmann

An employee of a pharmacy collects a swab sample from ma test person for a PCR (polymerase chain reaction) coronavirus test at a pharmacy in Zurich, Switzerland October 19, 2020. REUTERS/Arnd Wiegmann

An employee of a pharmacy collects a swab sample from ma test person for a PCR (polymerase chain reaction) coronavirus test at a pharmacy in Zurich, Switzerland October 19, 2020. REUTERS/Arnd Wiegmann

Laurie Szajna tests a sample of corn for humidity at Ag Plus, a farmer-owned co-op, in Woodburn, Indiana, U.S., October 16, 2020. Picture taken October 16, 2020. REUTERS/Bing Guan

A man reacts as a healthcare worker collects a swab sample amidst the spread of the coronavirus disease (COVID-19), at a testing centre, in New Delhi, India October 17, 2020. REUTERS/Adnan Abidi

A man reacts as a healthcare worker collects a swab sample amidst the spread of the coronavirus disease (COVID-19), at a testing centre, in New Delhi, India October 17, 2020. REUTERS/Adnan Abidi

A woman reacts as a healthcare worker collects a swab sample amidst the spread of the coronavirus disease (COVID-19), at a testing centre, in New Delhi, India October 17, 2020. REUTERS/Adnan Abidi

A woman reacts as a healthcare worker collects a swab sample amidst the spread of the coronavirus disease (COVID-19), at a testing centre, in New Delhi, India October 17, 2020. REUTERS/Adnan Abidi

A health worker holds a tube containing a sample during free mass testing for the coronavirus disease (COVID-19) in Kibera slums of Nairobi, Kenya, October 17, 2020. REUTERS/Baz Ratner

A health worker collects a swab sample from a child during free mass testing for the coronavirus disease (COVID-19) in Kibera slums of Nairobi, Kenya, October 17, 2020. REUTERS/Baz Ratner

A health worker prepares to collect a swab sample from a man during free mass testing for the coronavirus disease (COVID-19) in Kibera slums of Nairobi, Kenya, October 17, 2020. REUTERS/Baz Ratner

Health workers collect swab samples during free mass testing for the coronavirus disease (COVID-19) in Kibera slums of Nairobi, Kenya, October 17, 2020. REUTERS/Baz Ratner

A health worker collects a swab sample from a young girl during free mass testing for the coronavirus disease (COVID-19) in Kibera slums of Nairobi, Kenya, October 17, 2020. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

A woman looks at sample ballots while waiting at City Hall to cast her ballot for the upcoming presidential election as early voting begins in New Orleans, Louisiana, U.S., October 16, 2020. REUTERS/Kathleen Flynn