The most widely approved coronavirus vaccine in countries around the world was AZD1222, co-developed by AstraZeneca and Oxford University. AZ vaccine was the first approved COVID vaccine in Korea in February.

According to the MFDS, the KOBIA, abd the national vaccine safety technology support center, AZ vaccine was approved in 121 countries around the world, with the largest number of licensed countries among COVID-19 vaccines. AZ vaccine has been tested in the largest number of countries, with 35 clinical trials in 19 countries.

Developed by Pfizer and BioNTech, BNT162b2 has been licensed in 97 countries around the world. It was also granted the second COVID-19 vaccine in Korea following AZ