Covishield, Pfizer may be 90% effective against death by Delta variant: Report

This is the first study that shows how coronavirus vaccines are preventing death from the Delta variant, one of the deadliest variants in the Covid-19 pandemic so far.
A health worker prepares a dose of the Pfizer-BioNTech Covid-19 vaccine. (Waldo Swiegers / BLOOMBERG)
A health worker prepares a dose of the Pfizer-BioNTech Covid-19 vaccine. (Waldo Swiegers / BLOOMBERG)
Published on Oct 21, 2021 01:52 PM IST
Copy Link
PTI |

Two doses of Covishield and Pfizer COVID-19 vaccines may be 90 per cent effective at preventing deaths from the Delta variant of the SARS-CoV-2 virus, according to a study published in the New England Journal of Medicine on Thursday.

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, the dominant form of the virus in many other countries.

The research team from Universities of Edinburgh and Strathclyde and Public Health Scotland analysed data from 5.4 million people in Scotland between April 1 and September 27, 2021.

During this period, 115,000 people tested positive for COVID-19 through a PCR test conducted in the community, rather than in hospital, and there were 201 deaths recorded due to the virus.

The study found that the Pfizer-BioNTech vaccine is 90 per cent effective and the Oxford-AstraZeneca vaccine, known as Covishield in India, is 91 per cent effective in preventing deaths in people who have been double vaccinated, but who have tested positive for coronavirus in the community.

"With the Delta variant now the dominant strain in many places worldwide and posing a higher risk of hospitalisation 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," said Professor Aziz Sheikh, Director of the University of Edinburgh’s Usher Institute, and EAVE II study lead.

"If you still have not taken up your offer to be vaccinated, I would encourage you to do so based on the clear benefits it offers,” Sheikh said.

The researchers defined death from COVID-19 as anyone who died within 28 days of a positive PCR test, or with COVID-19 recorded as a cause of death on their death certificate.

The study analysed a dataset as part of the EAVE II project, which uses anonymised linked patient data to track the pandemic and the vaccine roll out in real time.

The researchers said to increase confidence in these early findings, the study needs to be repeated in other countries and settings, and with longer follow-up time after full vaccination.

They noted 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.

"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," said Professor Chris Robertson, from the University of Strathclyde and Public Health Scotland.

"It is very important to validate these early results in other settings and with a longer follow-up study," Robertson added. 

SHARE THIS ARTICLE ON
Close Story
QUICKREADS

Less time to read?

Try Quickreads

  • People rally in support of abortion rights Saturday, July 2, 2022, in Kansas City, Mo. (AP Photo/Charlie Riedel)

    Texas clinics halt abortions after state high court ruling

    The Friday night ruling stopped a three-day-old order by a Houston judge who said clinics could resume abortions up to six weeks into pregnancy. The following day, the American Civil Liberties Union said it doubted that any abortions were now being provided in a state of nearly 30 million people.

  • Other places from which Google will not store location data include fertility centers, addiction treatment facilities, and weight loss clinics.

    Google to delete user location history on US abortion clinic visits

    "If our systems identify that someone has visited one of these places, we will delete these entries from Location History soon after they visit," Jen Fitzpatrick, a senior vice president at Google, wrote in a blog post. "This change will take effect in the coming weeks."

  • Professor Ajay Agrawal, who was honoured with the Order of Canada in the 2022 list. (Credit: University of Toronto)

    Two Indo-Canadian academics honoured with Order of Canada

    Two Indo-Canadian academics, working on research to advance the betterment of mankind, have been honoured with one of the country's most prestigious awards, the Order of Canada. Their names were in the list published by the office of the governor-general of Canada Mary Simon. Both have been invested (as the bestowal of the awards is described) into the Order as a Member. They are professors Ajay Agrawal and Parminder Raina.

  • SpaceX founder and chief engineer Elon Musk.

    Elon Musk's Twitter hiatus, in 2nd week now,  generates curiosity 

    The world's richest person, Elon Musk, has not tweeted in about 10 days and it can't go unnoticed. The 51-year-old business tycoon has 100 million followers on the microblogging site, which he is planning to buy. Since April, he has been making headlines for the $44 billion deal and his comments and concerns about the presence of a large number of fake accounts on Twitter.

  • A Taliban fighter stands guard at a news conference about a new command of hijab by Taliban leader Mullah Haibatullah Akhundzada, in Kabul, Afghanistan.

    Taliban's reclusive supreme leader attends gathering in Kabul: Report

    The Taliban's reclusive supreme leader Haibatullah Akhundzada joined a large gathering of nationwide religious leaders in Kabul on Friday, the state news agency said, adding he would give a speech. The Taliban's state-run Bakhtar News Agency confirmed the reclusive leader, who is based in the southern city of Kandahar, was attending the meeting of more than 3,000 male participants from around the country, aimed at discussing issues of national unity.

SHARE
Story Saved
×
Saved Articles
Following
My Reads
Sign out
New Delhi 0C
Sunday, July 03, 2022