Created at	Source	Raw Value	Validated value
Feb. 25, 2022, noon	oms	Assess efficacy and immunogenicity of the booster dose of ChAdOx1 nCoV-19 (COVISHIELD) against COVID-19 in vaccine recipients compared to the placebo groupTimepoint: 6 months	Assess efficacy and immunogenicity of the booster dose of ChAdOx1 nCoV-19 (COVISHIELD) against COVID-19 in vaccine recipients compared to the placebo groupTimepoint: 6 months