Russia
“Let’s see how Sputnik V works in real life: Putin reveals he had close contact with Covid-19 infected person for a whole day”
https://www.rt.com/russia/534811-sputnikv-putin-contact-covid19/
In August 2020, Sputnik V became the world’s first registered Covid-19 vaccine. Since then, it has been authorized in 70 different countries.
I think there had been some talk of people who had the Oxford for their first jab being offered Sputnik as their second?