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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.
[353] [354] [355] Aiming for a realistic population vaccination coverage rate of 75%, and depending on the actual basic reproduction number, the necessary effectiveness of a COVID-19 vaccine is expected to need to be at least 70% to prevent an epidemic and at least 80% to extinguish it without further measures, such as social distancing. [356]
A highlight of minutes of the EMA's Pharmacovigilance Risk Assessment Committee (PRAC) concluding 9 April 2021, indicating they also were investigating four cases of unusual blood clots with low blood platelets, including one death, amongst people who had taken the Janssen COVID‑19 vaccine. The Janssen vaccine is approved but not yet deployed ...
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 ...
Russia has pushed ahead with its potential COVID-19 vaccine at top speed with mass public vaccinations alongside the main human trial, raising concerns among some observers that it was ...
On 29 June 2021, the director of the Gamaleya Institute, Denis Logunov, said that Sputnik V is about 90% effective against the Delta variant. [81] On July 21, researchers from PHE published a study finding that the Pfizer vaccine was 93.7% effective against symptomatic disease from Delta after 2 doses, while the Astrazeneca vaccine was 67% ...
It is similar to the approach used by the Oxford–AstraZeneca COVID-19 vaccine and the Russian Sputnik V COVID-19 vaccine [55] [56] which use human embryonic kidney 293 cells for adenovirus vector replication. [57] [58] The Ad26 viral vector lacks the E1 gene required for replication. Therefore, it cannot replicate in the human organism. [59] [60]
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related to: sputnik vaccine efficacy compared to moderna covid vaccine and blood clots