COVID-19 vaccination commonly consists of two doses inoculated 3-4 weeks apart, to allow time for the body to generate a corresponding immune response. The vaccine utilizes our ability to develop immunological memory to confer immunity.
The first dose primes the immune system defence program by introducing “simulated” COVID-19 viral parts into the body.
The second dose or booster, if administered within the appropriate window, will stimulate memory cells of the immune system to relaunch the programmed defences to deliver a more long-lasting and powerful protection for the individual.