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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.
Russia was quick to develop its two-dose Sputnik V vaccine last year and has also deployed a one-shot Sputnik Light vaccine, both of which have it says demonstrated high efficacy in trials, but ...
Pfizer and Moderna vaccines are both safe and have similar effectiveness at preventing COVID-19 illness. Clinical trial data when they were first released in December 2020 showed 95% efficacy for ...
Moderna has launched a trial of a vaccine to tackle the Beta variant or lineage B.1.351. [460] On 17 February 2021, Pfizer announced neutralization activity was reduced by two-thirds for this variant, while stating that no claims about the efficacy of the vaccine in preventing illness for this variant could yet be made. [461]
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.
Vaccines from AstraZeneca , Russia's Gamaleya Institute and Johnson & Johnson fight the coronavirus with another virus, leaving scientists concerned the shots may lose potency if annual ...
That, along with her Catholic faith, made her feel better protected against the virus, and she had hoped to get her second shot of the Russian-developed Sputnik V vaccine a few weeks later.
Vaccine Initial effectiveness by severity of COVID-19 Study location Refs Asymptomatic Symptomatic Hospitalization Death Oxford–AstraZeneca
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