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    GlossaryViral Vector Vaccine

    uses a modified virus to deliver genetic instructions

    A Viral Vector Vaccine uses a modified virus (the vector) to deliver genetic material from a different virus into human cells. This genetic material instructs cells to produce a protein that triggers an immune response, providing protection against the target virus. This type of vaccine is used in some COVID-19 vaccines, such as the Johnson & Johnson and AstraZeneca vaccines.

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