COVID Vaccines Are Over 90% Effective at Preventing Deaths From Delta Variant - SciTechDaily

Vaccination is over 90 percent effective at preventing deaths from the Delta variant of Covid-19, according to the first country-level data on mortality.

The Pfizer-BioNTech vaccine is 90 percent effective and the Oxford-AstraZeneca vaccine 91 percent effective in preventing deaths in people who have been double vaccinated, but who have tested positive for coronavirus in the community, research shows.

The study, using data from the Scotland-wide EAVE II Covid-19 surveillance platform, is the first to show across an entire country how effective vaccines are at preventing death from the Delta variant, which is now the dominant form of Covid-19 in the UK and many other countries.

Researchers analyzed data from 5.4 million people in Scotland between April 1 and September 27, 2021.

Consequently, it has not been possible to estimate its effectiveness in preventing death, researchers said.

The research team from Universities of Edinburgh and Strathclyde and Public Health Scotland analyzed a dataset as part of the EAVE II project, which uses anonymized linked patient data to track the pandemic and the vaccine rollout in real-time.

The team says that because of the observational nature of the study, data about vaccine effectiveness should be interpreted with caution and it is not possible to make a direct comparison between both vaccines.

Professor Aziz Sheikh, Director of the University of Edinburgh’s Usher Institute and EAVE II study lead, said: “With the Delta variant now the dominant strain in many places worldwide and posing a higher risk of hospitalization than previous variants seen in the UK, it is reassuring to see that vaccination offers such high protection from death very shortly after the second dose.”.

Professor Chris Robertson, University of Strathclyde and Public Health Scotland, said: “This study shows the value of carrying out analyses of routine healthcare data available in near real-time. .

“Our findings are encouraging in showing that the vaccine remains an effective measure in protecting both ourselves and others from death from the most dominant variant of Covid-19.

Reference: “BNT162b2 and ChAdOx1 nCoV-19 Vaccine Effectiveness against Death from the Delta Variant” 20 October 2021, New England Journal of Medicine.

The study was funded by the Medical Research Council, UK Research and Innovation Industrial Strategy Challenge Fund, the National Institute for Health Research and Health Data Research UK (HDR UK), and was supported by the Scottish Government.

Additional support was provided through the Scottish Government Director-General Health and Social Care, and the UKRI COVID-19 National Core Studies Data and Connectivity program led by HDR UK.

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