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A large-scale study in Buenos Aires from December 29, 2020, to May 15, 2021, with 663,602 participants aged 60 and older who received Spunik V, the Oxford–AstraZeneca vaccine, or the Sinopharm BIBP vaccine observed an overall efficacy of 98% (95% CI, 95 – 99%) against COVID-19-related deaths. The study noted that the three vaccines showed a ...
Vaccine Initial effectiveness by severity of COVID-19 Study location Refs Asymptomatic Symptomatic Hospitalization Death Oxford–AstraZeneca
The study found that in a sample size of 2,000 the AZD1222 vaccine afforded only "minimal protection" in all but the most severe cases of COVID-19. [468] On 7 February 2021, the Minister for Health for South Africa suspended the planned deployment of about a million doses of the vaccine whilst they examine the data and await advice on how to ...
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 ...
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% ...
The experimental vaccine, which met the main trial goal, was being tested in more than 11,000 people aged 12 years and older. The shot showed superior efficacy in adults than the current vaccine ...
Data show vaccines are effective against hospitalizations, although effectiveness against infection does wane. But that's not surprising. How effective are COVID-19 vaccines for children 5-11?
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.