Meta-analysis results for all treatments 
            
                 
            
        
            
            Treatment relative effect with 95% CI; and degree of certainty (adaptated from GRADE).
            
                
                method
            
        
        
            
                | Treament | Trials |  |  | 
            
                | clinical deterioration | clinical improvement | deaths | viral clearance | 
            | Ad26.RSV.preF (respiratory syncytial virus) | 0 | - | - | - | - |  | 
| Ad26.ZEBOV () | 0 | - | - | - | - |  | 
| Ad26.ZIKV.001 (Ad26-Vectored Anti-Zika Virus Vaccine) | 0 | - | - | - | - |  | 
| CanSino (Convidecia) | 0 | - | - | - | - |  | 
| Covishield (Oxford/AZ formulation) | 0 | - | - | - | - |  | 
| Janssen AD26 vaccine (JNJ-78436735) | 0 | - | - | - | - |  | 
| Sputnik V (Gam-COVID-Vac) | 0 | - | - | - | - |  | 
| SPUTNIK-LIGHT | 0 | - | - | - | - |  | 
| Vaxzevria (AstraZeneca Oxford - ChAdOx1 nCoV-19) | 0 | - | - | - | - |  |