_______ country has become the first one to roll out low cost Oxford AstraZeneca COVID-19 vaccine ?

a) Britain 
b) US
c) Japan
d) France

Britain became the first nation in the world on January 4, 2020 to roll out the low-cost and easily transportable Oxford-AstraZeneca COVID-19 vaccine. An 82-year-old man, dialysis patient Brian Pinker, became the first in the world on January 4th to receive the Oxford-AstraZeneca vaccine. He received his first vaccine dose at Oxford’s Churchill Hospital.