Adenovirus vector (nonreplicating) ChAdOx1-Sn Cov-19 Nonreplicating chimpanzee AdV5 expressing spike protein AstraZeneca and University of Oxford(AZD1222) One (day 0) or two (day 0, day 28) doses Intramuscular Phase 3 10 mM histidine, 7.5% (w/v) sucrose,35 mM sodium chloride, 1 mM magnesiumchloride, 0.1% (w/v) polysorbate 80,0.1 mM edetate disodium, 0.5% (w/v)ethanol, at pH 6.6