Scotland Times

Saturday, Jul 20, 2024

AstraZeneca Covid Vaccine Protection Wanes After 3 Months: Lancet Study

AstraZeneca Covid Vaccine Protection Wanes After 3 Months: Lancet Study

The findings drawn from datasets in Brazil and Scotland suggest that booster programmes are needed to help maintain protection from severe disease in those vaccinated with AstraZeneca, known as Covishield in India.
The protection offered by the Oxford-Astra Zeneca COVID-19 vaccine declines after three months of receiving two doses of the preventive, according to a study published in The Lancet journal.

The findings drawn from datasets in Brazil and Scotland suggest that booster programmes are needed to help maintain protection from severe disease in those vaccinated with AstraZeneca, known as Covishield in India.

The researchers analysed data for two million people in Scotland and 42 million people in Brazil who had been vaccinated with the AstraZeneca vaccine.

In Scotland, when compared with two weeks after receiving a second dose, there was approximately a five-fold increase in the chance of being hospitalised or dying from COVID-19 nearly five months after being double vaccinated, the researchers said.

The decline in effectiveness begins to first appear at around three months, when the risk of hospitalisation and death is double that of two weeks after the second dose, they said.

The researchers from Scotland and Brazil found that the risk of hospitalisation and death increases threefold just short of four months after the second vaccine dose. Similar numbers were seen for Brazil, they said.

"Vaccines have been a key tool in fighting the pandemic, but waning in their effectiveness has been a concern for a while," said Professor Aziz Sheikh, from the University of Edinburgh, UK.

"By identifying when waning first starts to occur in the Oxford-AstraZeneca vaccine, it should be possible for governments to design booster programmes that can ensure maximum protection is maintained," Sheikh said.

The team was able to compare data between Scotland and Brazil as they had a similar interval between doses - 12 weeks - and initial prioritisation of who was vaccinated - people at highest risk of severe disease and healthcare workers.

The dominant variant was different in each country during the study period -- Delta in Scotland and Gamma in Brazil.

This means the decline in effectiveness is likely because of vaccine waning and the impact of variants, according to the researchers.

The study also estimated vaccine effectiveness at similar fortnightly intervals by comparing outcomes of people who have been jabbed with those who are not vaccinated.

However, the experts warned that these figures should be treated with caution because it is becoming harder to compare non-vaccinated people to those vaccinated with similar characteristics, particularly among older age groups where so many people are now vaccinated.

"Our analyses of national datasets from both Scotland and Brazil suggest that there is considerable waning of effectiveness for the Oxford AstraZeneca vaccine, with protection against severe COVID-19 falling over time," said Professor Srinivasa Vittal Katikireddi from the University of Glasgow in the UK.

"Our work highlights the importance of getting boosters, even if you've had two doses of the Oxford AstraZeneca vaccine, as soon as you are able to," Srinivasa Katikiredd added.
Comments

Oh ya 3 year ago
Yup 3 months and its a flop and they want you to get a booster that will be the same thing. The vax fools are waiting to get there daily shot that should be approved shortly.
mike 3 year ago
Why do you talk about AstraZeneca? I didn't do that? By the way, that vaccine is out. You talk about the past.
harleyrider 3 year ago
AstraZeneca Covid Vaccine is NOT mRNA based. Get your facts straight.
mike 3 year ago
RNA "vaccines" poison the world

Newsletter

Related Articles

Scotland Times
0:00
0:00
Close
UK Island Orkney council to look at proposals to become territory of Norway
Woman Awarded Over £100,000 After Being Fired for Transgender Tweet
A provocative study suggests: Left-Wing Extremism and its Unsettling Connection to Psychopathy and Narcissism
A Real woman
Brand new security footage has just been released to the public showing the Active shooter Audrey Elizabeth Hale drove to Covenant Church School in her Honda Fit this morning, parked, and shot her way into the building
China's foreign ministry branch in Hong Kong urges British gov't to stop the biased and double standards Hong Kong report
Double standards: UK lawmakers attack EU chief over Ireland claims
Democracy? Not for UK. UK PM rejects Scottish independence referendum, cancel democracy in BVI
UK urged to brace for economic storm
Women's own body dissatisfaction appears to influence their judgment of other women's body sizes
Prince William To Move Family Into Cottage Near Queen Elizabeth II
BOOOOOOS: Tony Blair receives royal honour
Captured Britons sentenced to death in Ukraine
Barbados PM Mia A. Mottley among Time Magazine’s 100 Most Influential People
Today's headlines
"Just One Of the Boys In School:" Years That Shaped Prince Charles
BVI Premier Rubbishes Claim Of Causing COI Delay
Comments on "Human Intelligence in a Digital Age" - A brilliant Speech by MI6 Chief Richard Moore, and the elephants neglected in the room
Bitcoin: BoE Deputy Gov wants to cancel democracy and protect the banks with regulations which infringe on people’s freedom, independence and benefits they get from their own money.
What are the Pandora Papers?
Taiwan-China relations at their 'worst in 40 years'
The attempt to hold Epik.com accountable for the content of its clients' websites is like blaming Gutenberg for the NYT's fake news that dragged the US into the pointless war against the nuclear weapons Iraq never had
×