London Daily

Focus on the big picture.
Monday, Oct 06, 2025

Covid: Child jabs halted in trial as adult clot link probed

Covid: Child jabs halted in trial as adult clot link probed

A trial of the Oxford-AstraZeneca Covid vaccine on children has stopped giving out jabs while the UK's medicines regulator investigates a possible link with rare blood clots in adults.

Prof Andrew Pollard from the University of Oxford told the BBC there were no safety concerns with the trial itself, but its scientists were waiting for further information.

Around 300 volunteers signed up.

Earlier, PM Boris Johnson said people should get their jab when invited.

More than 31.6 million people in the UK have had a first vaccine dose and a total of 5.4 million people have received a second dose.

Two vaccines - developed by Oxford-AstraZeneca and Pfizer-BioNtech - are being used in the UK, while a third - from Moderna - has been approved.

The trial of the Oxford-AstraZeneca vaccine on children, which started in February, is assessing whether the jab produces a strong immune response in those aged between six and 17.

Its suspension comes after a European Medicines Agency (EMA) official, speaking in a personal capacity, said there appeared to be a link with the jab and rare blood clots.

Confirming that the trial on children was being paused, Prof Pollard said: "Whilst there are no safety concerns in the paediatric clinical trial, we await additional information from the MHRA on its review of rare cases of thrombosis/thrombocytopaenia that have been reported in adults, before giving any further vaccinations in the trial."

Participants are advised to continue to attend all scheduled visits and can contact the trial sites if they have any questions.

Updates from the EMA and the UK's regulator, the Medicines and Healthcare Products Regulatory Agency (MHRA), are expected in the coming days.

The EMA said its safety committee had "not yet reached a conclusion and the review is currently ongoing".

The MHRA says the benefits of the jab continue to outweigh any risk.

More information is needed

All medicines, from vaccines to paracetamol, have the potential to cause severe side effects.

The seasonal flu jab has around a one-in-a-million chance of causing the nerve disorder Guillain-Barre syndrome, for example.

The key question is whether the risks are worth the benefits.

Even if the vaccine was the cause, and this is still not proven, the numbers suggest around one death in every 2.5 million people vaccinated in the UK.

For everyone over the age of 75 infected there is one death per eight Covid infections.

For those in their 40s it is one death per 1,000.

On the face of it, the risk-benefit ratio is clearly in favour of vaccination if you assume you are going to be infected at some point.

But what is needed now is more information about who has been suffering from these rare blood clots. How old are they? Do they have any underlying health conditions that could explain what happened?

This will help narrow down the scale of any potential risks.

An update from the UK regulator - as well as the European one - is expected in the coming days.

During a visit to the AstraZeneca manufacturing plant in Macclesfield, Cheshire, earlier on Tuesday, Mr Johnson defended its vaccine.

"On the Oxford-AstraZeneca vaccine, the best thing people should do is look at what the MHRA say, our independent regulator - that's why we have them, that's why they are independent," said Mr Johnson, who has received the first dose of the vaccine himself.

"Their advice to people is to keep going out there, get your jab, get your second jab."

The prime minister added: "The best thing of all is to vaccinate our population, get everybody out getting the jab, that's the key thing and that's what I would advocate, number one."

The MHRA is investigating reports of a very rare and specific type of blood clot in the brain, known as cerebral venous sinus thrombosis (CVST), occurring together with low levels of platelets (thrombocytopenia) following vaccination.

A number of countries have suspended the use of the Oxford-AstraZeneca jab among younger people, including in Germany, which has paused it for people aged below 60, and Canada, where the jab is not being given to those under 55.

In total, the UK has secured 457 million Covid vaccine doses, of which 100 million are from AstraZeneca. Vaccines from Moderna will be deployed in the UK "around the third week of April", Vaccines Minister Nadhim Zahawi has said.

The MHRA has said it identified 30 cases of rare blood clot events out of 18.1 million doses of the jab administered up to and including 24 March. There have been seven deaths among the 30 cases.

But the regulator's chief executive Dr June Raine said: "People should continue to get their vaccine when invited to do so.

"Our thorough and detailed review is ongoing into reports of very rare and specific types of blood clots with low platelets [the cells involved in clotting] following the Covid-19 vaccine AstraZeneca.

"No decision has yet been made on any regulatory action."

There have been a further 2,379 coronavirus cases in the UK and another 20 deaths within 28 days of a positive Covid test, according to the latest government figures.



The PM on the safety of the AstraZeneca jab


Newsletter

Related Articles

0:00
0:00
Close
Three Scientists Awarded Nobel Prize in Medicine for Discovery of Immune Self-Tolerance Mechanism
OpenAI and AMD Forge Landmark AI-Chip Alliance with Equity Option
Munich Airport Reopens After Second Drone Shutdown
France Names New Government Amid Political Crisis
Trump Stands Firm in Shutdown Showdown and Declares War on Drug Cartels — Turning Crisis into Opportunity
Surge of U.S. Billionaires Transforms London’s Peninsula Apartments into Ultra-Luxury Stronghold
Pro Europe and Anti-War Babiš Poised to Return to Power After Czech Parliamentary Vote
Jeff Bezos Calls AI Surge a ‘Good’ Bubble, Urges Focus on Lasting Innovation
Japan’s Ruling Party Chooses Sanae Takaichi, Clearing Path to First Female Prime Minister
Sean ‘Diddy’ Combs Sentenced to Fifty Months in Prison Following Prostitution Conviction
Taylor Swift’s ‘Showgirl’ Launch Extends Billion-Dollar Empire
Trump Administration Launches “TrumpRx” Plan to Enable Direct Drug Sales at Deep Discounts
Trump Announces Intention to Impose 100 Percent Tariff on Foreign-Made Films
Altman Says GPT-5 Already Outpaces Him, Warns AI Could Automate 40% of Work
Singapore and Hong Kong Vie to Dominate Asia’s Rising Gold Trade
Trump Organization Teams with Saudi Developer on $1 Billion Trump Plaza in Jeddah
Manhattan Sees Surge in Office-to-Housing Conversions, Highest Since 2008
Switzerland and U.S. Issue Joint Assurance Against Currency Manipulation
Electronic Arts to Be Taken Private in Historic $55 Billion Buyout
Thomas Jacob Sanford Named as Suspect in Deadly Michigan Church Shooting and Arson
Russian Research Vessel 'Yantar' Tracked Mapping Europe’s Subsea Cables, Raising Security Alarms
New York Man Arrested After On-Air Confession to 2017 Parents’ Murders
U.S. Defense Chief Orders Sudden Summit of Hundreds of Generals and Admirals
Global Cruise Industry Posts Dramatic Comeback with 34.6 Million Passengers in 2024
Trump Claims FBI Planted 274 Agents at Capitol Riot, Citing Unverified Reports
India: Internet Suspended in Bareilly Amid Communal Clashes Between Muslims and Hindus
Supreme Court Extends Freeze on Nearly $5 Billion in U.S. Foreign Aid at Trump’s Request
Archaeologists Recover Statues and Temples from 2,000-Year-Old Sunken City off Alexandria
China Deploys 2,000 Workers to Spain to Build Major EV Battery Factory, Raising European Dependence
Speed Takes Over: How Drive-Through Coffee Chains Are Rewriting U.S. Coffee Culture
U.S. Demands Brussels Scrutinize Digital Rules to Prevent Bias Against American Tech
Ringo Starr Champions Enduring Beatles Legacy While Debuting Las Vegas Art Show
Private Equity’s Fundraising Surge Triggers Concern of European Market Shake-Out
Colombian President Petro Vows to Mobilize Volunteers for Gaza and Joins List of Fighters
FBI Removes Agents Who Kneeled at 2020 Protest, Citing Breach of Professional Conduct
Trump Alleges ‘Triple Sabotage’ at United Nations After Escalator and Teleprompter Failures
Shock in France: 5 Years in Prison for Former President Nicolas Sarkozy
Tokyo’s Jimbōchō Named World’s Coolest Neighbourhood for 2025
European Officials Fear Trump May Shift Blame for Ukraine War onto EU
BNP Paribas Abandons Ban on 'Controversial Weapons' Financing Amid Europe’s Defence Push
Typhoon Ragasa Leaves Trail of Destruction Across East Asia Before Making Landfall in China
The Personality Rights Challenge in India’s AI Era
Big Banks Rebuild in Hong Kong as Deal Volume Surges
Italy Considers Freezing Retirement Age at 67 to Avert Scheduled Hike
Italian City to Impose Tax on Visiting Dogs Starting in 2026
Arnault Denounces Proposed Wealth Tax as Threat to French Economy
Study Finds No Safe Level of Alcohol for Dementia Risk
Denmark Investigates Drone Incursion, Does Not Rule Out Russian Involvement
Lilly CEO Warns UK Is ‘Worst Country in Europe’ for Drug Prices, Pulls Back Investment
Nigel Farage Emerges as Central Force in British Politics with Reform UK Surge
×