A viral vector vaccine is produced when genetic content from a COVID-19 virus is inserted into a unrelated, harmless virus. When the viral vector receives into your cells, it provides genetic content from the COVID-19 virus that presents your cells guidance for how to make the spike protein found on the area of the COVID-19 virus. As soon as your cells displace the spike proteins on their surfaces, your immune procedure results in antibodies that can struggle the COVID-19 virus.