What is the COVID-19 booster?
What is the COVID-19 booster?
user
It is a booster vaccine, which is a jab that helps to develop immunity.
assistant
What is the difference between the booster and the vaccine?
user
The primary vaccine is given to healthy people, to get them immune to COVID-19. It lasts a very long time, like a few years.  The booster vaccine is only given to people who had the primary vaccine, and it lasts for just a few months.
assistant
Thank you very much for this information.
user