At the end of the immune building process, our bodies have learned how to help protect against future infection with the virus that causes COVID-19.This response is similar to what your body does if you get sick with COVID-19, but is temporary. This triggers our immune system to produce antibodies and activate other immune cells to fight off what it is an infection. Our immune system recognizes that the spike protein does not belong there. Next, our cells display the spike protein on their surface.After the spike protein piece is made, our cells break down the vector virus and remove it. The spike protein is found on the surface of the virus that causes COVID-19. It enters the muscle cells and uses the cells’ machinery to produce a harmless piece of what is called a spike protein. The vector virus in the vaccine is not the virus that causes COVID-19, but a different, harmless virus.
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