London Daily

Focus on the big picture.
Saturday, Sep 13, 2025

Boys more at risk from Pfizer jab side-effect than Covid, suggests study

Boys more at risk from Pfizer jab side-effect than Covid, suggests study

US researchers say teenagers are more likely to get vaccine-related myocarditis than end up in hospital with Covid
Healthy boys may be more likely to be admitted to hospital with a rare side-effect of the Pfizer/BioNTech Covid vaccine that causes inflammation of the heart than with Covid itself, US researchers claim.

Their analysis of medical data suggests that boys aged 12 to 15, with no underlying medical conditions, are four to six times more likely to be diagnosed with vaccine-related myocarditis than ending up in hospital with Covid over a four-month period.

Most children who experienced the rare side-effect had symptoms within days of the second shot of Pfizer/BioNTech vaccine, though a similar side-effect is seen with the Moderna jab. About 86% of the boys affected required some hospital care, the authors said.

Saul Faust, professor of paediatric immunology and infectious diseases at the University of Southampton, who was not involved in the work, said the findings appeared to justify the cautious approach taken on teenage vaccines by the UK’s Joint Committee on Vaccines and Immunisation.

The JCVI did not recommend vaccinating healthy 12 to 15-year-olds, but referred the matter to the UK’s chief medical officers who are expected to make a final decision next week. Children aged 12 to 15 who are particularly vulnerable to Covid, or who live with an at-risk person, are eligible for the shots.

In the latest study, which has yet to be peer reviewed, Dr Tracy Høeg at the University of California and colleagues analysed adverse reactions to Covid vaccines in US children aged 12 to 17 during the first six months of 2021. They estimate the rate of myocarditis after two shots of Pfizer/BioNTech vaccine to be 162.2 cases per million for healthy boys aged 12 to 15 and 94 cases per million for healthy boys aged 16 to 17. The equivalent rates for girls were 13.4 and 13 cases per million, respectively. At current US infection rates, the risk of a healthy adolescent being taken to hospital with Covid in the next 120 days is about 44 per million, they said.

How reliable the data is and whether similar numbers could be seen in the UK if healthy 12 to 15-year-olds are vaccinated are unclear: vaccine reactions are recorded differently in the US and shots are given at longer time intervals in the UK. According to the UK medicines regulator, the rate of myocarditis after Covid vaccination is only six per million shots of Pfizer/BioNTech.

So far, UK children have not been admitted to hospital for Covid in large numbers and may not be at great risk of long Covid. While the recent Clock study found that up to 14% of children who caught Covid may still have symptoms 15 weeks later, levels of fatigue appear similar to those in children who have not caught the virus. This suggests that children may be spared some of the most debilitating problems seen in adult long Covid.

The overwhelming majority of myocarditis appears after the second dose of vaccine, so offering single shots could protect children while reducing their risk of the side effect even further.

“While myocarditis after vaccination is exceptionally rare, we may be able to change the first or second doses or combine vaccines differently to avoid the risk at all, once we understand the physiology better,” said Prof Faust. “On balance, there is no urgency to immunise children from a medical perspective, although if schools are unable to maintain education for the vast majority at all times, the overall balance could shift. If my two teenage children are offered the vaccine by the NHS my GP wife and I will have no hesitation in allowing them to receive the vaccine.”

Prof Adam Finn, a member of JCVI at the University of Bristol, said: “I stand by the JCVI advice, which is not to go ahead at this time with vaccinating healthy 12 to 15-year-olds on health outcome risk-benefit grounds given the current uncertainty – as there is a small but plausible risk that rare harms could turn out to outweigh modest benefits.”
Newsletter

Related Articles

0:00
0:00
Close
One in Three Europeans Now Uses TikTok, According to the Chinese Tech Giant
Could AI Nursing Robots Help Healthcare Staffing Shortages?
NATO Deploys ‘Eastern Sentry’ After Russian Drones Violate Polish Airspace
Anesthesiologist Left Operation Mid-Surgery to Have Sex with Nurse
Tens of Thousands of Young Chinese Get Up Every Morning and Go to Work Where They Do Nothing
The New Life of Novak Djokovic
The German Owner of Politico Mathias Döpfner Eyes Further U.S. Media Expansion After Axel Springer Restructuring
Suspect Arrested: Utah Man in Custody for Charlie Kirk’s Fatal Shooting
In a politically motivated trial: Bolsonaro Sentenced to 27 Years for Plotting Coup After 2022 Defeat
German police raid AfD lawmaker’s offices in inquiry over Chinese payments
Turkish authorities seize leading broadcaster amid fraud and tax investigation
Volkswagen launches aggressive strategy to fend off Chinese challenge in Europe’s EV market
ChatGPT CEO signals policy to alert authorities over suicidal youth after teen’s death
The British legal mafia hit back: Banksy mural of judge beating protester is scrubbed from London court
Surpassing Musk: Larry Ellison becomes the richest man in the world
Embarrassment for Starmer: He fired the ambassador photographed on Epstein’s 'pedophile island'
Manhunt after 'skilled sniper' shot Charlie Kirk. Footage: Suspect running on rooftop during panic
Effective Protest Results: Nepal’s Prime Minister Resigns as Youth-Led Unrest Shakes the Nation
Qatari prime minister says Netanyahu ‘killed any hope’ for Israeli hostages
King Charles and Prince Harry Share First In-Person Moment in 19 Months
Starmer Establishes Economic ‘Budget Board’ to Centralise Policy and Rebuild Business Trust
France Erupts in Mass ‘Block Everything’ Protests on New PM’s First Day
Poland Shoots Down Russian Drones in Airspace Violation During Ukraine Attack
Brazilian police say ex-President Bolsonaro had planned to flee to Argentina seeking asylum
Trinidad Leader Applauds U.S. Naval Strike and Advocates Forceful Action Against Traffickers
Kim Jong Un Oversees Final Test of New High-Thrust Solid-Fuel Rocket Engine
Apple Introduces Ultra-Thin iPhone Air, Enhanced 17 Series and New Health-Focused Wearables
Macron Appoints Sébastien Lecornu as Prime Minister Amid Budget Crisis and Political Turmoil
Supreme Court temporarily allows Trump to pause billions in foreign aid
Charlie Sheen says his father, Martin Sheen, turned him in to the police: 'The greatest betrayal possible'
Vatican hosts first Catholic LGBTQ pilgrimage
Apple Unveils iPhone 17 Series, iPhone Air, Apple Watch 11 and More at 'Awe Dropping' Event
Pig Heads Left Outside Multiple Paris Mosques in Outrage-Inducing Acts
Nvidia’s ‘Wow’ Factor Is Fading. The AI chip giant used to beat Wall Street expectations for earnings by a substantial margin. That trajectory is coming down to earth.
France joins Eurozone’s ‘periphery’ as turmoil deepens, say investors
On the Anniversary of Queen Elizabeth’s Death: Prince Harry Returns to Britain
France Faces New Political Crisis, again, as Prime Minister Bayrou Pushed Out
Murdoch Family Finalises $3.3 Billion Succession Pact, Ensuring Eldest Son’s Leadership
Big Oil Slashes Jobs and Investments Amid Prolonged Low Crude Prices
Court Staff Cover Up Banksy Image of Judge Beating a Protester
Social Media Access Curtailed in Turkey After CHP Calls for Rallies Following Police Blockade of Istanbul Headquarters
Nayib Bukele Points Out Belgian Hypocrisy as Brussels Considers Sending Army into the Streets
Elon Musk Poised to Become First Trillionaire Under Ambitious Tesla Pay Plan
France, at an Impasse, Heads Toward Another Government Collapse
Burning the Minister’s House Helped Protesters to Win Justice: Prabowo Fires Finance Minister in Wake of Indonesia Protests
Brazil Braces for Fallout from Bolsonaro Trial by corrupted judge
The Country That Got Too Rich? Public Spending Dominates Norway Election
Nearly 40 Years Later: Nike Changes the Legendary Slogan Just Do It
Generations Born After 1939 Unlikely to Reach Age One Hundred, New Study Finds
End to a four-year manhunt in New Zealand: the father who abducted his children to the forests was killed, the three siblings were found
×