90 year old Margaret Keenan, the first patient in the UK to receive the Pfizer-BioNTech COVID-19 vaccine, administered by nurse May Parsons at University Hospital, Coventry, England, Tuesday Dec. 8, 2020. The United Kingdom, one of the countries hardest hit by the coronavirus, is beginning its vaccination campaign, a key step toward eventually ending the pandemic. (Jacob King/Pool via AP)
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90 year old Margaret Keenan, the first patient in the UK to receive the Pfizer-BioNTech COVID-19 vaccine, administered by nurse May Parsons at University Hospital, Coventry, England, Tuesday Dec. 8, 2020. The United Kingdom, one of the countries hardest hit by the coronavirus, is beginning its vaccination campaign, a key step toward eventually ending the pandemic. (Jacob King/Pool via AP)
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Cardiff, Wales CNN  — 

The United Kingdom has become the world’s first nation to begin vaccinating its citizens with a fully vetted and authorized Covid-19 shot, a landmark moment in the coronavirus pandemic.

The first Briton to get the Pfizer/BioNTech vaccine – 90-year-old Margaret Keenan – received the first of two doses at 6:31 a.m. local time on Tuesday at University Hospital in Coventry, less than a week after the UK became the first country to approve it.

Keenan, who turns 91