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COVID-19: How do viral vector vaccines work?

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infection, our immune system reacts to molecules from the pathogen. If it is our first encounter with the invader, a finely tuned cascade of processes come together to fight the pathogen and build up immunity for future encounters.Many traditional vaccines deliver an infectious pathogen or a part of it to our bodies to train our immune system to fight off future exposures to the pathogen.Viral vector vaccines work differently.

They make use of a harmless virus to deliver a piece of genetic code from a pathogen to our cells to mimic an infection. The harmless virus acts as a delivery system, or vector, for the genetic sequence.Our cells then make the viral or bacterial protein that the vector has delivered and present it to our immune.

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