Explainer: How the AstraZeneca-Oxford COVID vaccine works

The video explains the AstraZeneca Oxford vaccine, which uses a genetically modified chimpanzee cold virus as a vector to deliver the genetic code for the coronavirus spike protein. This spike protein is crucial for the virus to enter human cells. The vaccine's vector is weakened and cannot grow in the human body. Once injected, it prompts cells to produce spike proteins, which are harmless but trigger an immune response. This response generates antibodies and memory cells that recognize and fight the actual SARS-CoV-2 virus, responsible for COVID-19.

Explain how the vaccine triggers an immune response in the body.

What is the significance of the antibodies and memory cells produced by the vaccine?