Dr. Shuhui Sun performs a step of histological staining of mouse liver for pathological analysis in the Aging and Regeneration lab at the Institute for Stem Cell and Regeneration of the Chinese Academy of Sciences (CAS) in Beijing, China, January 12, 2021. Picture taken January 12, 2021. REUTERS/Tingshu Wang

Dr. Shuhui Sun performs histological staining of mouse liver for pathological analysis in the Aging and Regeneration lab at the Institute for Stem Cell and Regeneration of the Chinese Academy of Sciences (CAS) in Beijing, China, January 12, 2021. Picture taken January 12, 2021. REUTERS/Tingshu Wang

Dr. Shuhui Sun performs a step of histological staining of mouse liver for pathological analysis in the Aging and Regeneration lab at the Institute for Stem Cell and Regeneration of the Chinese Academy of Sciences (CAS) in Beijing, China, January 12, 2021. Picture taken January 12, 2021. REUTERS/Tingshu Wang

Dr. Fouad Boulos, Associate Professor of Clinical Pathology and Laboratory Medicine at the American University of Beirut (AUB) pushes a baby cart near his wife and children, at Beirut International airport, in Beirut, Lebanon November 6, 2020. Picture taken November 6, 2020. REUTERS/Mohamed Azakir

Dr Ghazi Zaatari, Associate Dean for Faculty Affairs and Chair of the Department of Pathology & Laboratory Medicine at American University of Beirut (AUB), gestures during an interview with Reuters in Beirut, Lebanon November 3, 2020. Picture taken November 3, 2020. REUTERS/Issam Abdallah

Prism Pathology prepares samples under a laboratory fume hood before testing for the coronavirus disease (COVID-19) in Dallas, Texas, U.S. June 24, 2020. REUTERS/Cooper Neill

Prism Pathology prepares samples under a laboratory fume hood before testing for the coronavirus disease (COVID-19) in Dallas, Texas, U.S. June 24, 2020. REUTERS/Cooper Neill

Prism Pathology prepares samples before testing for the coronavirus disease (COVID-19) in Dallas, Texas, U.S. June 24, 2020. REUTERS/Cooper Neill

Prism Pathology prepares samples under a laboratory fume hood before testing for the coronavirus disease (COVID-19) in Dallas, Texas, U.S. June 24, 2020. REUTERS/Cooper Neill

A Nationwide Pathology van leaves Watford Football Club Training ground following the outbreak of the coronavirus disease (COVID-19), London Colney, Britain, May 20, 2020. REUTERS/Paul Childs

A Nationwide Pathology van arrives at Watford Football Club Training ground following the outbreak of the coronavirus disease (COVID-19), London Colney, Britain, May 20, 2020. REUTERS/Paul Childs

Britain's Chancellor of the Exchequer Rishi Sunak visits the pathology labs at Leeds General Infirmary, to show how yesterday's budget is supporting those affected by coronavirus (COVID-19), in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit by Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit by Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak visits the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

A drop-off point to receive coronavirus samples for testing at the entrance to the pathology laboratories at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

The entrance to the pathology laboratories, which will receive coronavirus samples for testing, at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

A drop-off point to receive coronavirus samples for testing, with empty bottles and swab supplies at the entrance to the pathology laboratories at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

A drop-off point to receive coronavirus samples for testing, with empty bottles and swab supplies at the entrance to the pathology laboratories at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak speaks during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak speaks during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Transgender young man Gabriel Diaz de Tudanca, 20, and his girlfriend Ruth take part in a protest to stop transgender pathologization in Madrid, Spain, October 20, 2018. REUTERS/Susana Vera SEARCH "VERA GABRIEL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. THE IMAGES SHOULD ONLY BE USED TOGETHER WITH THE STORY - NO STAND-ALONE USES

Containers of sprouted canola seed sit in the double haploid/pathology lab of Monsanto Canada's plant breeding centre, where researchers are attempting to develop a clubroot-resistant canola variety, in Winnipeg, Manitoba, Canada February 12, 2018. Picture taken February 12, 2018. REUTERS/Shannon VanRaes

Associate Professor of Pathology and Doctor Sevdegul Aydin Mungan, 40, poses in her laboratory in a university hospital in Trabzon, Turkey, April 5, 2017. She says she will vote 'Yes'. "I am a humanist and a patriot. I had serious problems because of my headscarf while I was a student and then as an academic at the university hospital. I had friends wearing headscarves who left school and had mental problems. I am grateful to President Recep Tayyip Erdogan because under his rule I was aware again that I was human. I had the right to work with clothes that expressed my way of being. Erdogan is in love with his nation. If 'Yes' wins, we will become a more respectful and powerful country. But some countries are not comfortable with Turkey becoming more powerful." REUTERS/Umit Bektas SEARCH "VOXPOPS UMIT" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.?

Queen Silvia and King Carl XVI Gustaf of Sweden look at exhibits "Diseases in Wax" during their visit at the pathology section of the Charite hospital in Berlin, Germany, October 7, 2016. REUTERS/Fabrizio Bensch

Queen Silvia and King Carl XVI Gustaf of Sweden look at exhibits "Diseases in Wax" during their visit at the pathology section of the Charite hospital in Berlin, Germany, October 7, 2016. REUTERS/Fabrizio Bensch

Forensic pathology workers carry the body of a suspected looter at Mabopane shopping centre, north of Pretoria , South Africa ,June 23, 2016. REUTERS/Siphiwe Sibeko

A forensic technician makes notes while performing an autopsy on a crime victim at the morgue of the Forensic Institute in San Salvador, July 7, 2015. In El Salvador the number of homicides surged 70 percent last year, making the central American nation among the most violent countries in the world. Violence and murders have risen steadily since a 2012 truce between the two main street gangs began to fall apart. Months of reporting show killings in the suburbs of the capital, San Salvador, where powerful gangs known as maras control entire neighbourhoods. REUTERS/Jose Cabezas PICTURE 34 OF 35 - SEARCH "CABEZAS MURDER" FOR ALL IMAGES

Forensic physicians carry out an autopsy on a unknown person at the morgue of Rosario, north of Buenos Aires, Argentina September 10, 2015. International drug-enforcement officials have taken to calling Rosario "The Tijuana of Argentina" for what it has in common with the Mexican border city used to move cocaine into the United States. Experts say the drug enters Argentina by truck or plane from Andean cocaine-producing countries to the north. The smuggling routes narrow the closer shipments get to Rosario, increasing violent competition among gangs to control the final steps toward the Parana River, which leads south to Buenos Aires and the shipping lanes of the Atlantic. Drug-related killings spiked so high in Rosario last year that federal forces were called in to provide security. To match story ARGENTINA-DRUGS/ Picture taken September 10, 2015. REUTERS/Enrique Marcarian

Forensic physicians carry out an autopsy on a unknown person at the morgue of Rosario, north of Buenos Aires, September 10, 2015. International drug-enforcement officials have taken to calling Rosario "The Tijuana of Argentina" for what it has in common with the Mexican border city used to move cocaine into the United States. Experts say the drug enters Argentina by truck or plane from Andean cocaine-producing countries to the north. The smuggling routes narrow the closer shipments get to Rosario, increasing violent competition among gangs to control the final steps toward the Parana River, which leads south to Buenos Aires and the shipping lanes of the Atlantic. Drug-related killings spiked so high in Rosario last year that federal forces were called in to provide security. To match story ARGENTINA-DRUGS/ Picture taken September 10, 2015. REUTERS/Enrique Marcarian

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF DEATH AND INJURY Forensic physicians carry out an autopsy at a morgue in Rosario, north of Buenos Aires, September 10, 2015. Members of Argentina’s Gendarmerie took control of security in parts of the city last year after a spike in violence in drug-infested neighbourhoods. The local morgue reports a fall in homicides since April 2014, when the government sent its Gendarmerie to Rosario to provide law and order in areas of the city. Picture taken September 10, 2015. REUTERS/Enrique Marcarian

Flowers are placed on the pathology table in a dissection room next to the crematorium in the former Buchenwald concentration camp near Weimar, April 12, 2015. Germany marks the 70th anniversary of the liberation of the Buchenwald concentration camp by the U.S. army on April 11, 1945. REUTERS/Kai Pfaffenbach

A rose is placed on the pathology table in a dissection room next to the crematorium in the former Buchenwald concentration camp near Weimar, April 12, 2015. Germany marks the 70th anniversary of the liberation of the Buchenwald concentration camp by the U.S. army on April 11, 1945. REUTERS/Kai Pfaffenbach

Members of the media film as a ranger performs a post mortem on the carcass of a rhino after it was killed for its horn by poachers at the Kruger national park in Mpumalanga province August 27, 2014. Rhino poachers in South Africa now risk giving themselves away when they shoot thanks to a high-tech, gunfire-detection system being piloted in the country's flagship Kruger National Park.The stakes are high, for rhinos are being slain in escalating numbers for their prized horns, alarming both conservationists and the government since wildlife in South Africa is an important tourist draw. Picture taken August 27, 2014. REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: ENVIRONMENT SOCIETY ANIMALS MEDIA)

Brown family attorney Daryl Parks points on an autopsy diagram to the head wound that was likely fatal to Michael Brown during a news conference in Ferguson, Missouri August 18, 2014. The family of Michael Brown, a teenager shot dead by a police officer in Ferguson, Missouri, paid for an independent autopsy which was carried out by Dr. Michael Baden, former chief medical examiner for the City of New York. REUTERS/Mark Kauzlarich (UNITED STATES - Tags: CIVIL UNREST CRIME LAW POLITICS TPX IMAGES OF THE DAY)

A miner looks on as a forensic pathology service vehicle leaves a shaft at Harmony Gold's Doornkop mine near Johannesburg February 6, 2014. Rescuers recovered eight bodies and continued to search for another missing worker on Thursday after a fire and rock-fall at a Harmony Gold mine near Johannesburg, the worst accident in South Africa's mines in nearly five years. Mineral Resources Minister Susan Shabangu ordered an investigation into the incident at the Doornkop mine, 30 km west (20 miles) of the city, after initial reports that the fire was triggered by a small earthquake on Tuesday evening. REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: BUSINESS EMPLOYMENT)

Dissecting facilities are pictured inside the pathology adjacent to the crematorium at former concentration camp Buchenwald near Weimar April 11, 2013. Between July 1937 and April 1945, the Nazis imprisoned a quarter million people in concentration camp Buchenwald with a death toll of around 56,000. Buchenwald was liberated on April 11, 1945 by U.S troops. Picture taken April 11, 2013. REUTERS/Lisi Niesner (GERMANY - Tags: ANNIVERSARY POLITICS SOCIETY)

A picture taken in 1945 hangs on the wall inside the pathology building adjacent to the crematorium at former concentration camp Buchenwald near Weimar April 11, 2013. Between July 1937 and April 1945, the Nazis imprisoned a quarter million people in concentration camp Buchenwald with a death toll of around 56,000. Buchenwald was liberated on April 11, 1945 by U.S troops. Picture taken April 11, 2013. REUTERS/Lisi Niesner (GERMANY - Tags: ANNIVERSARY POLITICS SOCIETY)

Members of art group 'Murga Los Rengos del Bajo' Gabriela Arto (L) applies make-up while Edgardo Zappoli, who suffers from Spina Bifida, waits before a carnival performance in Buenos Aires February 17, 2013. The art group was founded in 2000 by the Association for Spina Bifida and Hydrocephalus (APEBI), as a center aimed to improve social integration of people with differents pathologies such spina bifid, blindness and mentally diseases. REUTERS/Enrique Marcarian (ARGENTINA - Tags: HEALTH SOCIETY)

Visitors view "Trinity -Pharmacology, Physiology, Pathology" by British artist Damien Hirst at the Tate Modern gallery in London April 2, 2012. Hirst's retrospective show runs from April 4 to September 9. REUTERS/Toby Melville (BRITAIN - Tags: ENTERTAINMENT SOCIETY)

Surinamese Veterinarian Audrey Steenland-Smit (L), Monique Pool of Green Heritage Fund Suriname (C) and Danish Necrologist Trine Hammer-Jensen (R), take biometric data from a dead Costero dolphin during an autopsy in Suriname, in Paramaribo, March 13, 2012. The NGO named Green Heritage Fund Suriname has a program in which it collects information about dolphins as they are concerned with the effects of increasing oil exploration off the coast of neighboring Guyana, the organization said. REUTERS/Ranu Abhelakh (SURINAME - Tags: ENVIRONMENT ANIMALS)

Delaney Goodner, 15 has makeup applied by a volunteer before attending a prom organised by The Children's Hospital for cancer patients, in Denver June 8, 2010. Goodner was diagnosed with soft tissue cancer in June 2008, underwent a 54-week-treatment of chemotherapy and radiation and was given a clean bill of health. Last week she discovered a lump on her thigh. It was removed and is now awaiting pathology results. Picture taken June 8, 2010. REUTERS/Rick Wilking (UNITED STATES - Tags: HEALTH SOCIETY)

Canadian Prime Minister Stephen Harper (2nd L) and his wife Laureen (2nd R) pay silent tribute after offering flowers at the grave of Dr. Frank Schofield at the national cemetery in Seoul December 7, 2009. According to local media, Schofield came to Korea in 1916 as a medical missionary instructor for the Presbyterian Church of Canada and taught bacteriology and sanitation until his return home under the pressure from Japanese colonial authorities in 1920. The Canadian missionary returned to Korea as a national guest by invitation of the South Korean government in 1958 and taught pathology at a university until he died in 1970. Schofield was known for taking pictures of the Cheam-ri incident, in which the Japanese burnt people inside a church in 1919. REUTERS/Lee Jae-Won (SOUTH KOREA POLITICS)

Canadian Prime Minister Stephen Harper (2nd L) and his wife Laureen (2nd R) pay silent tribute after offering flowers at the grave of Dr. Frank Schofield at the national cemetery in Seoul December 7, 2009. According to local media, Schofield came to Korea in 1916 as a medical missionary instructor for the Presbyterian Church of Canada and taught bacteriology and sanitation until his return home under the pressure from Japanese colonial authorities in 1920. The Canadian missionary returned to Korea as a national guest by invitation of the South Korean government in 1958 and taught pathology at a university until he died in 1970. Schofield was known for taking pictures of the Cheam-ri incident, in which the Japanese burnt people inside a church in 1919. REUTERS/Lee Jae-Won (SOUTH KOREA POLITICS)

An illustration of a kidney and samples are shown in the Investigational Pathology lab at the U.S. Food and Drug Administration (FDA) headquarters in Silver Spring, Maryland, November 5, 2009. REUTERS/Jason Reed (UNITED STATES HEALTH SCI TECH)