HOW DOES COVID-19 VACCINE WORK



 HOW DOES COVID-19 VACCINE WORK

Vaccines work by preparing a person's immune system (the body’s natural 

defences) to recognise and defend itself against a specific disease.

Most research on COVID-19 vaccines involves generating responses to all or part of 

a protein (spike protein, or protein S) that is unique to the virus that causes 

COVID-19. When a person receives the vaccine, it will trigger an immune response.

If the person is infected by the virus later on, the immune system recognises the 

virus and, because it is already prepared to attack the virus, protects the person 

from COVID-19.




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