Q. Which country rolled out the first vaccine in the world?
Answer:
United Kingdom
Notes: The United Kingdom became the first country in the world to start using the COVID-19 vaccine. The vaccine developed by Pfizer and BioNTech was approved by the regulators.
Several hubs across the country are vaccinating the people. The vaccine is given as two injections with 21 days apart. The complete immunity is said to be reached seven days after the second dose.