- Researchers sampled 100,000 people between October and November
- Those boosters reduce the risk of infection by two-thirds compared to two doses.
- Yesterday it was revealed that NHS England plans to rollout boosters every year
The COVID vaccine booster dose reduces the risk of infection by two-thirds compared to two jabs, a mass surveillance claimed today.
Data from the React study – which randomly tested more than 100,000 people between October 19 and November 5 – found that the third dose provided a significant boost to immunity.
Of the more than 8,300 people studied, of those who were given the booster, only 30 (0.36 percent) became infected two weeks after the onset of immunity.
This was compared to nearly 700 out of 68,000 (1.03 percent) who were getting infected in two doses during this period.
After adjusting for age and other factors, researchers from Imperial College London said this meant the chance of a successful transition was reduced by two-thirds.
Professor Paul Elliott, an epidemiologist who led the study, said the findings were important because they showed the boosters are ‘highly effective’.
This comes after data from the ONS today suggested that people with a Covid booster have a one in five chance of catching Covid compared to those without vaccination.
NHS England already plans to rollout boosters every year, its chief executive Amanda Pritchard revealed yesterday.
The COVID vaccine booster dose reduces the risk of infection by two-thirds compared to two jabs, a mass surveillance claimed today. The graph shows: people in different age groups in England who were not vaccinated (lightest blue), had one dose (second lightest blue), two doses (second darkest blue) and a booster dose (dark blue) ) was the ratio
The graph shows: the proportion of people infected with COVID between October 19 and November 5 (orange bar) compared to September 9 to 27 (grey bar) across different age groups
The graph shows: the proportion of people infected with COVID between 19 October and 5 November (orange bar) compared to 9 and 27 September (grey bar) across different regions in England
Official data shows that COVID boosters reduce the chance of infection by up to 80% compared to non-vaccinated people
People with a Covid booster have a one in five chance of catching covid, new data shows.
The Office for National Statistics (ONS) has estimated the probability of catching COVID based on the vaccination status of a person.
People who had just received a COVID booster received the best protection, as well as those who already had natural immunity who became infected with the virus.
These people were 80 percent less likely to test positive for COVID than the non-vaccinated people.
Those who got their second Pfizer jab 90 days earlier had slightly less protection, 78 percent less likely to test positive.
But in a sign of potentially weakened immunity, protection from two of Pfizer’s jabs fell to just a 60 percent reduction 91 days after getting the vaccine.
For the Oxford-AstraZeneca jab, people who received the vaccine were 34 percent less likely to test positive for COVID up to 90 days after their second dose.
In contrast to the Pfizer jab, data from the ONS shows that people who received the vaccine more than 91 days ago were 39 percent less likely to catch the vaccine.
The ONS gave no reason for this trend, but a possible explanation is that people younger than 40 received a Pfizer jab after a small blood clot risk was identified in the Oxford-AstraZeneca vaccine.
People over the age of 40 receiving the AstraZeneca vaccine are also being treated with more caution as they wait to receive their booster jab.
In the UK, top-up doses were approved in September for all over 50, health and care domestic workers and critically ill patients and ministers this week expanded the program to people in their forties .
Vaccine consultants in the UK have acknowledged they can be given to young adults but are waiting for more conclusive evidence on their safety and efficacy.
In an indication of the direction of travel, NHS England boss Amanda Pritchard said yesterday that the health service is already planning to deliver an annual COVID booster vaccine campaign in the UK.
Speaking at a press briefing today, Professor Elliot said: ‘The question of the test is “You have already been double vaccinated and immunity is going down. Can we boost immunity with the third dose?”
‘ And the answer is: “Yes, boosters are highly effective”.
He said the booster program was “imaginatively impressive” and he was “very optimistic” it would mean cases would not rise over the winter.
He added: ‘The booster is being rolled out into the hundreds of thousands every day. We have shown really positive effects of boosters on people who have been double vaccinated.
‘Getting a third dose for double-vaccinated adults will reduce the chance of transmission as we move into the winter period.
‘It is essential that the booster program in the UK is able to rapidly reach the vast majority of the more vulnerable population in order to put pressure on health services to prevent immunity from eroding.’
Dr Simon Clark, associate professor of cellular microbiology at the University of Reading, said the findings show the importance of a booster program in preventing cases from becoming unbearable this winter.
He added: ‘React continues to demonstrate the vaccine’s effectiveness in adults.
‘These latest data showed a significant difference in the risk of infection if they had received a vaccine booster dose.
‘As we move into the winter months, it highlights the importance of the government’s booster campaign in keeping a firm lid on both infection numbers and the risk of Christmas restrictions.’
The study found that infections are by far the highest among school children, with about one in 20 to 17-year-olds testing positive.
Parents of school children were also more …