Banners showing support for NHS staff are displayed at Manchester Royal Infirmary, as the spread of the coronavirus disease (COVID-19) continues, in Manchester, Britain, March 23, 2020. REUTERS/Molly Darlington

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

A couple pass a sign outside the Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell

A general view outside the Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell

An ambulance stands near the entrance to Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell

A view shows Queen Victoria's Statue at Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell

Soccer Football - Premier League - Newcastle United v Norwich City - St James' Park, Newcastle, Britain - February 1, 2020 General view outside the Royal Victoria Infirmary Action Images via Reuters/Lee Smith EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

View of the Royal Victoria Infirmary in Newcastle, Britain January 31, 2020. REUTERS/Lee Smith

People walk past the main entrance to the Royal Victoria Infirmary in Newcastle, Britain January 31, 2020. REUTERS/Lee Smith

The sign of the main entrance to the Royal Victoria Infirmary is seen in Newcastle, Britain January 31, 2020. REUTERS/Lee Smith

An ambulance drives towards The Royal Infirmary in Edinburgh, Scotland, Britain January 24, 2020. REUTERS/Russell Cheyne

Handcuffs can be seen on the infirmary bed inside of the maximum security federal penitentiary in Brasilia, Brazil March 27, 2019. Picture taken March 27, 2019. To match Insight BRAZIL-VIOLENCE/ REUTERS/Ueslei Marcelino

Members of the Italian-flagged rescue vessel Mare Jonio set up an infirmary onboard as they join forces with the British-flagged NGO Proactiva Open Arms under the "Mediterranea - Saving Humans" project in the central Mediterranean Sea, October 5, 2018. REUTERS/Alkis Konstantinidis

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

A relative of a Palestinian, who was killed by Israeli troops, reacts at a hospital in Ramallah, in the occupied West Bank June 6, 2018. REUTERS/Mohamad Torokman TPX IMAGES OF THE DAY

General view of Salford Royal Infirmary where former Manchester United manager Sir Alex Ferguson is being treated in Manchester, Britain - May 5, 2018. REUTERS/Phil Noble

General view of Salford Royal Infirmary where former Manchester United manager Sir Alex Ferguson is being treated in Manchester, Britain - May 5, 2018. REUTERS/Phil Noble

General view of Salford Royal Infirmary where former Manchester United manager Sir Alex Ferguson is being treated in Manchester, Britain - May 5, 2018. REUTERS/Phil Noble

General view of Salford Royal Infirmary where former Manchester United manager Sir Alex Ferguson is being treated in Manchester, Britain - May 5, 2018. REUTERS/Phil Noble

A patient is pushed down a corridor in Frimley Park Hospital near Camberley, Britain, January 4, 2018. REUTERS/Toby Melville

A view of a maternity hospital damaged from the war against Islamic State militants in east Mosul, Iraq August 15, 2017. Picture taken August 15, 2017. REUTERS/Azad Lashkari TPX IMAGES OF THE DAY

Dr. Nicole Arthur (R), visits Tariyana Wiggins, a high school teacher, shortly after the birth of Troy O’Brien Williams in the hospital room at the North Baldwin Infirmary, a 70-bed hospital in rural Bay Minette, Alabama, U.S. on June 22, 2017. Picture taken on June 22, 2017. REUTERS/Jilian Mincer

A hospital bed stands at a former Soviet military hospital, which lies derelict since 1991 when the last Russian troops left Hungary, in Budapest, Hungary, May 15, 2017. REUTERS/Laszlo Balogh SEARCH "SOVIET HOSPITAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY

A view shows the damage at a hospital after an airstrike in Deir al-Sharqi village in Idlib province, Syria April 27 2017. REUTERS/Ammar Abdullah TPX IMAGES OF THE DAY

A man wounded in a bomb attack in Kokjali, receives treatment at a hospital in the northern Iraqi city of Erbil, December 22, 2016. REUTERS/Ammar Awad TPX IMAGES OF THE DAY

Relatives wait outside a hospital where victims of an explosion at the San Pablito fireworks market are being treated in Zumpango, Mexico December 21, 2016. REUTERS/Henry Romero

Relatives react while standing outside a hospital where victims of an explosion at the San Pablito fireworks market are being treated in Zumpango, Mexico December 21, 2016. REUTERS/Henry Romero

Relatives wait outside a hospital where victims of an explosion at the San Pablito fireworks market are being treated in Zumpango, Mexico December 21, 2016. REUTERS/Henry Romero

Relatives wait outside a hospital where victims of an explosion at the San Pablito fireworks market are being treated in Zumpango, Mexico December 21, 2016. REUTERS/Henry Romero

Relatives react while standing outside a hospital where victims of an explosion at the San Pablito fireworks market are being treated in Zumpango, Mexico December 21, 2016. REUTERS/Henry Romero

Coffins containing the remains of victims of the Pakistan International Airlines (PIA) plane crash are carried into the mortuary at PIMS hospital in Islamabad, Pakistan December 8, 2016. REUTERS/Caren Firouz

Coffins containing the remains of victims of the Pakistan International Airlines (PIA) plane crash arrive at PIMS hospital by ambulance in Islamabad, Pakistan December 8, 2016. REUTERS/Caren Firouz

A displaced woman who was injured in clashes and fleeing from Islamic State militants of Mosul, receives treatment at a hospital west of Erbil, Iraq, November 25, 2016. REUTERS/Azad Lashkari

A nurse works in a corridor at the Pellegrin Hospital in Bordeaux, Southwestern France, November 23, 2016. REUTERS/Regis Duvignau

A nurse walks in a corridor at the Pellegrin Hospital in Bordeaux, Southwestern France, November 23, 2016. REUTERS/Regis Duvignau