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An article published by the journal Nature on 6 July 2021 cited data released by the United Arab Emirates on some 81,000 individuals who had received Sputnik V, according to which the vaccine demonstrated an efficacy of 97.8% in preventing symptomatic COVID-19, and 100% efficacy in preventing severe complications.
A vaccine is generally considered effective if the estimate is ≥50% with a >30% lower limit of the 95% confidence interval. [6] As of September 2021, no study on Sputnik Light reported confidence intervals, so it is not possible to know the accuracy of the estimates. Effectiveness is generally expected to slowly decrease over time. [7]
In addition, vaccine developers have been criticized for aggressively advertising their vaccine efficacy prior to the completion of phase III clinical trial. The most substantial criticism came from Dr. Konstantin Chumakov, who currently serves as the associate director for Research at the FDA Office of Vaccines Research and Review.
English: Sputnik V efficacy for different conditions. Data from: Logunov D. Y. et al. Safety and efficacy of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine: an interim analysis of a randomised controlled phase 3 trial in Russia.
On 11 August 2020, President Putin said in a meeting that the Sputnik V vaccine (registered as Gam-COVID-Vac) developed by the Gamaleya Research Institute of Epidemiology and Microbiology was the first vaccine against the coronavirus to be registered.
Relevant to how vaccines can end the pandemic by preventing asymptomatic infection, they have also indicated possibly reduced antibody neutralization against Beta with most of the widely distributed vaccines (Oxford–AstraZeneca, Sputnik V, Janssen, Pfizer–BioNTech, Moderna, Novavax; minimal to substantial reduction) except CoronaVac and ...
(Bloomberg Opinion) -- There was no clearer way of signaling how Russia sees its coronavirus vaccine: Moscow named it Sputnik, after the satellite whose launch in 1957 marked the start of the ...
Vaccine Initial effectiveness by severity of COVID-19 Study location Refs Asymptomatic Symptomatic Hospitalization Death Oxford–AstraZeneca