Margaret Keenan, a 90-year-old grandmother on Tuesday became the first Briton/person in the world to receive the Pfizer Covid-19 vaccine shot outside of a clinical trial.

The United Kingdom has become the first Western nation to begin vaccinating its citizens with a coronavirus shot outside of clinical trials, a landmark moment amid the pandemic, CNN reported.

Those who are vaccinated will be issued with a "vaccination passport" containing details such as date of vaccination and date of the first inoculation to remind people when to receive the second jab.

The vaccine has to be administered twice.

More than 40,000 volunteers were involved in the vaccine trials with only mild side effects being reported among the volunteers.

Keenan received the first of two vaccine doses at 6:31 am (local time) at University Hospital in Coventry, a week before she turns 91 years old.

The first 800,000 doses are going to people over 80 who are either hospitalized or already have outpatient appointments scheduled, along with nursing home workers. Others will have to wait their turn.