The AstraZeneca Vaccine, also known as Vaxzevria, is a viral vector vaccine developed to protect against COVID-19. It uses a modified version of a common cold virus (adenovirus) from chimpanzees to deliver genetic material that instructs cells to produce a harmless piece of the SARS-CoV-2 virus, prompting an immune response. This vaccine is administered in two doses, typically given 4 to 12 weeks apart. It has been widely used in many countries and is known for its easier storage requirements compared to some mRNA vaccines, making it accessible for distribution in various healthcare settings.