A dressed-up doll representing baby Jesus holds a flask representing an antidote while promoting the use of masks as a precautionary measure amid the coronavirus disease (COVID-19) outbreak before Christmas celebration, inside a store in Mexico City, Mexico, December 9, 2020. REUTERS/Edgard Garrido 

View of a new medical facility set up for testing migrant workers residing in dormitories for the coronavirus disease (COVID-19), in Singapore May 10, 2020. REUTERS/Edgar Su REFILE - CLARIFYING INFORMATION 

View of a new medical facility set up for testing migrant workers residing in dormitories for the coronavirus disease (COVID-19), in Singapore May 10, 2020. REUTERS/Edgar Su REFILE - CLARIFYING INFORMATION 

A health worker holds a blood sample while testing municipal workers from the Miraflores district of Lima for the coronavirus disease (COVID-19), in Lima, Peru April 13, 2020. REUTERS/Sebastian Castaneda 

A health worker is seen with blood samples during a testing of municipal workers from the Miraflores district of Lima for the coronavirus disease (COVID-19), in Lima, Peru April 13, 2020. REUTERS/Sebastian Castaneda 

A medical specialist wearing a protective suit collects blood specimen, while testing employees of local municipal institutions for coronavirus disease (COVID-19), in Lviv, Ukraine March 30, 2020. REUTERS/Roman Baluk 

A view shows rapid tests for coronavirus disease (COVID-19), as medical specialists collect blood specimens of employees of local municipal institutions in Lviv, Ukraine March 30, 2020. REUTERS/Roman Baluk 

A medical specialist collects blood specimen, while testing employees of local municipal institutions for coronavirus disease (COVID-19), in Lviv, Ukraine March 30, 2020. REUTERS/Roman Baluk 

A medical specialist collects blood specimen, while testing employees of local municipal institutions for coronavirus disease (COVID-19), in Lviv, Ukraine March 30, 2020. REUTERS/Roman Baluk 

A woman in a gas mask attends a protest demanding equality on International Women's Day in Paris, France, March 8, 2020. The placard reads "Patriarchy virus. We are the antidote". REUTERS/Pascal Rossignol TPX IMAGES OF THE DAY 

A worker holds a respirator containing a nanofibrous layer at the Pardam nanotechnology factory in Roudnice nad Labem, Czech Republic, January 30, 2020. REUTERS/David W Cerny 

A worker checks a nanofibrous layer used to produce respirators at the Pardam nanotechnology factory in Roudnice nad Labem, Czech Republic, January 30, 2020. REUTERS/David W Cerny 

Respirators containing nanofibrous layers are pictured at the Pardam nanotechnology factory in Roudnice nad Labem, Czech Republic, January 30, 2020. REUTERS/David W Cerny 

62nd Grammy Awards – Photo Room– Los Angeles, California, U.S., January 26, 2020 – Chick Corea & The Spanish Heart Band pose backstage with their Best Latin Jazz Album award for "Antidote". REUTERS/Monica Almeida 

62nd Grammy Awards – Photo Room– Los Angeles, California, U.S., January 26, 2020 – Chick Corea & The Spanish Heart Band pose backstage with their Best Latin Jazz Album award for "Antidote". REUTERS/Monica Almeida 

62nd Grammy Awards - Show - Los Angeles, California, U.S., January 26, 2020 - Chick Corea and The Spanish Heart Band accept the award for Best Latin Jazz Album for "Antidote." REUTERS/Mario Anzuoni 

A protestor against U.S. President Donald Trump demonstrates with a large balloon reading "Your VOTE is the only antidote" outside the fourth U.S. Democratic presidential candidates 2020 election debate at Otterbein University in Westerville, Ohio U.S. October 15, 2019. REUTERS/Aaron Josefczyk 

A protester holds a sign that says "The antidote is in the streets" during a protest against the Attorney General for his alleged links to the Odebrecht scandal in Bogota, Colombia, January 11, 2019. REUTERS/Luisa Gonzalez 

The mother of a baby suspected of dying from Ebola, cries outside a hospital in Beni, North Kivu Province of Democratic Republic of Congo, December 15, 2018. REUTERS/Goran Tomasevic TPX IMAGES OF THE DAY 

The mother of a baby suspected of dying from Ebola, cries outside a hospital in Beni, North Kivu Province of Democratic Republic of Congo, December 15, 2018. REUTERS/Goran Tomasevic 

The mother of a baby suspected of dying from Ebola, cries outside a hospital in Beni, North Kivu Province of Democratic Republic of Congo, December 15, 2018. REUTERS/Goran Tomasevic 

A healthcare worker holds washed parts of protective gear at a transit centre in Beni, North Kivu Province of Democratic Republic of Congo, December 15, 2018. REUTERS/Goran Tomasevic 

A healthcare worker holds washed parts of protective gear at a transit centre in Beni, North Kivu Province of Democratic Republic of Congo, December 15, 2018. REUTERS/Goran Tomasevic 

A wheelchair used by patients with kidney failure is seen at a dialysis centre at a hospital in the Red Sea port city of Hodeidah, Yemen November 28, 2018. Picture taken November 28, 2018. REUTERS/Abduljabbar Zeyad 

An Egyptian doctor makes a test during an unprecedented campaign that aims to test 50 million people to detect and treat hepatitis C patients in a bid to eliminate the disease by 2022, in Cairo, Egypt November 11, 2018. Picture taken November 11, 2018. REUTERS/Mohamed Abd El Ghany 

A physically disabled protester on a wheelchair takes part in a demonstration marking the International Day of Persons with Disabilities, in Athens, Greece December 3, 2018. REUTERS/Costas Baltas 

A medical worker draws blood from a woman for an HIV test during an event to raise awareness on World AIDS Day, in Kunming, Yunnan province, China December 1, 2018. REUTERS/Wong Campion 

A migrant man, part of a caravan of thousands traveling from Central America en route to the United States, receives vaccination for influenza A H1N1 in a makeshift camp in Mexico City, Mexico, November 15, 2018. REUTERS/Ueslei Marcelino 

A three-dimensional printout of a human heart is seen at the Heidelberg University Hospital (Universitaetsklinikum Heidelberg) in Heidelberg, Germany, August 14, 2018. Picture taken August 14, 2018. To match Insight HEALTHCARE-MEDICAL TECHNOLOGY/AI REUTERS/Ralph Orlowski 

A pot containing a urine bag is pictured at an obstetric fistula repair centre in Maiduguri, Nigeria August 1, 2018. Picture taken August 1, 2018. REUTERS/Afolabi Sotunde 

A patient lies on a bed as she recovers at an obstetric fistula repair centre in Maiduguri, Nigeria July 31, 2018. Picture taken July 31, 2018. REUTERS/Afolabi Sotunde 

Used blister packets that contained medicines, tablets and pills are seen, in this picture illustration taken June 30, 2018. REUTERS/Russell Boyce/Illustration 

Used blister packets that contained medicines, tablets and pills are seen, in this picture illustration taken June 30, 2018. REUTERS/Russell Boyce/Illustration 

Used blister packets that contained medicines, tablets and pills are seen, in this picture illustration taken June 30, 2018. REUTERS/Russell Boyce/Illustration 

An ancient medicine is displayed in "St. Maria della Scala" pharmacy, known as a pharmacy of the Pope, in Rome, Italy, May 26, 2018. REUTERS/Alessandro Bianchi 

Ancient medicines are displayed in "St. Maria della Scala" pharmacy, known as a pharmacy of the Pope, in Rome, Italy May 26, 2018. REUTERS/Alessandro Bianchi 

Plants used in traditional medicines are seen on sale at a market in Durban, South Africa, May 25, 2018. REUTERS/Rogan Ward 

Pharmacy shop signs are seen in Valletta, Malta May 22, 2018. REUTERS/Darrin Zammit Lupi 

A pharmacy shop sign is seen in Valletta, Malta May 22, 2018. REUTERS/Darrin Zammit Lupi 

Traditional medicines cook at Khuong Vien traditional medical shop in Hanoi, Vietnam May 22, 2018. REUTERS/Kham 

Boxes containing traditional medicines are seen at Khuong Vien traditional medical shop in Hanoi, Vietnam May 22, 2018. REUTERS/Kham 

A World Health Organization (WHO) worker prepares to administer a vaccination during the launch of a campaign aimed at beating an outbreak of Ebola in the port city of Mbandaka, Democratic Republic of Congo May 21, 2018. REUTERS/Kenny Katombe 

A World Health Organization (WHO) worker prepares to administer a vaccination during the launch of a campaign aimed at beating an outbreak of Ebola in the port city of Mbandaka, Democratic Republic of Congo May 21, 2018. REUTERS/Kenny Katombe 

Paracetamol tablets are pictured on the production line for UPSA brand of Bristol-Myers Squibb Group at the company's factory in Le Passage, near Agen, France March 29, 2018. REUTERS/Regis Duvignau 

Nicanor Parra, the Chilean artist and writer who described himself as an "antidote," is seen during the celebration of his 100th birthday at his house in Las Cruces coastal town, Chile September 5, 2014. Picture taken September 5, 2014. REUTERS/Ivan Alvarado 

A woman holds marijuana for sale at the MedMen store in West Hollywood, California U.S. January 2, 2018. REUTERS/Lucy Nicholson 

A Radiology sign is pictured in a hospital in Philadelphia , Pennsylvania, U.S. May 30, 2017. Picture taken May 30, 2017. REUTERS/Carlo Allegri 

An X-Ray Department sign is pictured in a hospital in Philadelphia , Pennsylvania, U.S. May 30, 2017. Picture taken May 30, 2017. REUTERS/Carlo Allegri 

A woman is vaccinated during a campaign of vaccination against yellow fever in Rio de Janeiro, Brazil, March 25, 2017. REUTERS/Ricardo Moraes 

Doctors perform neurosurgery in Los Angeles, California, U.S. on May 26, 2016. REUTERS/Lucy Nicholson 

An employee sorts freshly harvested cannabis buds at a medical marijuana plantation in northern Israel March 21, 2017. Picture taken March 21, 2017. REUTERS/Nir Elias 

Harvested cannabis buds are seen at a medical marijuana plantation in northern Israel March 21, 2017. Picture taken March 21, 2017. REUTERS/Nir Elias 

Young cannabis plants are seen at a medical marijuana plantation in northern Israel March 21, 2017. Picture taken March 21, 2017. REUTERS/Nir Elias 

An employee checks cannabis plants at a medical marijuana plantation in northern Israel March 21, 2017. Picture taken March 21, 2017. REUTERS/Nir Elias 

Young cannabis plants are seen at a medical marijuana plantation in northern Israel March 21, 2017. Picture taken March 21, 2017. REUTERS/Nir Elias 

An employee prepares medical marijuana joints at a plantation in northern Israel March 21, 2017. Picture taken March 21, 2017. REUTERS/Nir Elias 

An employee sweeps bits of harvested cannabis on the floor at a medical marijuana plantation in northern Israel March 21, 2017. Picture taken March 21, 2017. REUTERS/Nir Elias 

A man receives treatment inside the dialysis center in the rebel-held town of Douma, in the besieged Eastern Ghouta suburbs of Damascus, Syria March 15, 2017. REUTERS/Bassam Khabieh 

Training equipments are seen at a spinal cord injury rehabilitation centre in Douma, the main rebel-stronghold in eastern Ghouta on the outskirts of Damascus, Syria, February 14, 2017. REUTERS/Bassam Khabieh SEARCH "SPINE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A leech in quarantine is seen in a jar at the Ricarimpex laboratory in Eysines, Southwestern France, July 22, 2016. The leech, Hirudo medicinalis, is an invertebrate 3 cm long in adulthood which after being considered indispensable in the 19th century to cure many affections such as osteoarthritis, phlebitis, tension, then fell in desuetude while it harboured qualities that made it indispensable today in plastic surgery. Picture taken July 22, 2016. REUTERS/Regis Duvignau TPX IMAGES OF THE DAY