Sputnik V would be able to protect against the more severe effects of Delta variant of the Covid. He does know “Science“Reporting a study on nearly 14,000 people showing how the Russian vaccine, after two doses, would be able to” reduce the risk of hospitalization by 81% “and help” prevent serious lung injury “.
Sputnik V, “Science” recalls, is now authorized in 69 countries. But has not yet passed the review of the European Medicines Agency. Furthermore, the latest waves of Covid “have raised concerns that vaccines do not protect against Delta as much as they do against previous strains, or that vaccine protection may be short-lived. However, a recent study on Pfizer-BioNTech and AstraZeneca found that they are largely effective against Delta ». So one wonders: how do other vaccines perform against this mutation? As for Sputnik V, “Science” summarizes the results of a study done in St. Petersburg.
And he explains: “Like other cities in Russia, St. Petersburg has set up triage centers where patients with a confirmed diagnosis of Sars-Cov-2 and symptoms of Covid-19 undergo low-dose computed tomography of the lungs to check whether they need to be hospitalized. A team led by the epidemiologist Anton Barchuk of the European University of St. Petersburg asked the doctors of two of these centers to also inquire about the vaccination status of the patients ».
The research was conducted on 13,894 people, 1,291 of whom were fully vaccinated: of the participants, 495 were hospitalized. Sputnik V offered fully vaccinated patients, who had had their second dose at least two weeks before going to the triage center, 81% protection against hospitalization. The effectiveness was slightly better in women than in men, 84% versus 76%. And even if the study did not confirm the viral variants of the patients, the Russian health authorities attributed 95% of the cases of Covid to the Delta variant in the months of July and August, when the study was conducted “. The researchers also found “that Sputnik V was 76% effective in protecting against severe lung injury.”
Finally, the research “has not measured the protection against Sars-Cov-2 infection or mild forms of the disease. But the authors’ calculations offered an indirect estimate of the efficacy against symptomatic disease of about 50% ». John Moore, an immunologist at Weill Cornell Medicine, then stated in “Science” that the results of the study «seem credible and also consistent with expectations. And that the 81% protection against hospitalization is somewhat less than the recent efficacy of mRna vaccines seen in the United States and elsewhere, but it is still very good. ‘
Delta variant doubles the risks of serious illness and hospitalization, but double dose of vaccine protects
Mass vaccination with Sputnik V has progressed slowly in Russia: about 22% of the country’s population is fully vaccinated. And in fact, “Science” recalls, “only a few studies have been conducted on the effectiveness of Sputnik. Barchuk hopes that others will follow, especially given the global spread of the Delta variant ». And he says: “Unfortunately, there is a dearth of studies for Sputnik compared to other vaccines. And this only increases the controversy, both in Russia and globally ».
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