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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.
Vaccine efficacy is the reduction in risk of getting the disease by vaccinated participants in a controlled trial compared with the risk of getting the disease by unvaccinated participants. [346] An efficacy of 0% means that the vaccine does not work (identical to placebo).
The updated vaccine targets the JN.1 variant, which is slightly older than KP.2, but the company reported data that showed the vaccine provides immunity against multiple variant strains recently ...
Retrospective cohort study of the effectiveness of two Russian vaccines against the SARS-CoV-2 Delta variant in Moscow (June–July 2021) proved that EpiVacCorona, unlike Sputnik V, is an ineffective vaccine and therefore cannot protect against COVID-19. [4]
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 ...
(Reuters) -Moderna and rival Pfizer on Wednesday said their updated COVID-19 vaccines generated strong responses in testing against the highly mutated BA.2.86 subvariant of the coronavirus that ...
The mutation, also present in the Beta and Gamma variants, raised concerns about the possibility of reduced effectiveness of vaccines and antibody treatments and increased risk of reinfection. [149] The variant, called "Delta with K417N" by Public Health England, includes two clades corresponding to the Pango lineages AY.1 and AY.2. [ 150 ]
In the future, chasing variants may not prove to be the most effective or efficient approach to COVID vaccination. As Topol put it, “by the time a BA.5 vaccine booster is potentially available ...
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