what type of vaccine is astrazeneca

The AstraZeneca COVID-19 vaccine is a viral vector vaccine containing a modified, replication-deficient chimpanzee adenovirus ChAdOx1, containing the spike protein of SARS-CoV-2. It requires two doses, given four weeks apart, to prime the immune system to fight off the coronavirus. The vaccine has an efficacy of 72% against symptomatic SARS-CoV-2 infection. It is safe and effective at protecting people from the extremely serious risks of COVID-19, including death, hospitalization, and severe disease. The recommended dosage is two doses given intramuscularly (0.5ml each) with an interval of 8 to 12 weeks.