Treatment relative effect with 95% CI; and degree of certainty (adaptated from GRADE).
            
                
                method
            
        
        
            
                | Treament | Trials |  |  | 
            
                | clinical deterioration | clinical improvement | deaths | viral clearance | 
            | Vaxzevria (AstraZeneca Oxford - ChAdOx1 nCoV-19) | 19 | - | - | 0.20 [0.02; 1.72], 1 RCT, I2=0% inconclusive result
 | - |  | 
| Janssen AD26 vaccine (JNJ-78436735) | 9 | - | - | 0.19 [0.04; 0.81], 1 RCT, I2=0% unassessable degree of certainty
 | - |  | 
| CanSino (Convidecia) | 3 | - | - | - | - |  | 
| Sputnik V (Gam-COVID-Vac) | 2 | - | - | - | - |  | 
| Covishield (Oxford/AZ formulation) | 1 | - | - | - | - |  | 
| Ad26.RSV.preF (respiratory syncytial virus) | 0 | - | - | - | - |  | 
| Ad26.ZEBOV () | 0 | - | - | - | - |  | 
| Ad26.ZIKV.001 (Ad26-Vectored Anti-Zika Virus Vaccine) | 0 | - | - | - | - |  | 
| SPUTNIK-LIGHT | 0 | - | - | - | - |  |