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COVENTRY, ENGLAND - DECEMBER 08: Margaret Keenan, 90, is the first patient in the United Kingdom to receive the Pfizer/BioNtech covid-19 vaccine at University Hospital, Coventry, administered by nurse May Parsons, at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)

COVENTRY, ENGLAND - DECEMBER 08: Margaret Keenan, 90, is the first patient in the United Kingdom to receive the Pfizer/BioNtech covid-19 vaccine at University Hospital, Coventry, administered by nurse May Parsons, at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)

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COVENTRY, ENGLAND - DECEMBER 08: Margaret Keenan, 90, is applauded by staff as she returns to her ward after becoming the first person in the United Kingdom to receive the Pfizer/BioNtech covid-19 vaccine at University Hospital at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)

COVENTRY, ENGLAND - DECEMBER 08: Margaret Keenan, 90, is applauded by staff as she returns to her ward after becoming the first person in the United Kingdom to receive the Pfizer/BioNtech covid-19 vaccine at University Hospital at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)

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COVENTRY, ENGLAND - DECEMBER 08: Margaret Keenan, 90, is applauded by staff as she returns to her ward after becoming the first person in the United Kingdom to receive the Pfizer/BioNtech covid-19 vaccine at University Hospital at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)

COVENTRY, ENGLAND - DECEMBER 08: Margaret Keenan, 90, is applauded by staff as she returns to her ward after becoming the first person in the United Kingdom to receive the Pfizer/BioNtech covid-19 vaccine at University Hospital at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)

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COVENTRY, ENGLAND - DECEMBER 08: "Bill" William Shakespeare, 81, receives the Pfizer/BioNTech covid-19 vaccine at University Hospital at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)

COVENTRY, ENGLAND - DECEMBER 08: "Bill" William Shakespeare, 81, receives the Pfizer/BioNTech covid-19 vaccine at University Hospital at the start of the largest ever immunisation programme in the UK's history on December 8, 2020 in Coventry, United Kingdom. More than 50 hospitals across England were designated as covid-19 vaccine hubs, the first stage of what will be a lengthy vaccination campaign. NHS staff, over-80s, and care home residents will be among the first to receive the Pfizer/BioNTech vaccine, which recently received emergency approval from the country's health authorities. (Photo by Jacob King - Pool / Getty Images)