London Daily

Focus on the big picture.
Saturday, May 31, 2025

Oxford, WHO scientists say more data needed on AstraZeneca's Covid vaccine trials

Oxford, WHO scientists say more data needed on AstraZeneca's Covid vaccine trials

More data is needed from AstraZeneca's Covid vaccine trials beyond what was presented in a press release, experts from the WHO and Oxford University said.

More data will be needed from AstraZeneca’s coronavirus vaccine trials to determine the drug’s safety and efficacy following concerns from experts in the U.S., scientists from the University of Oxford and the World Health Organizations said on Friday.

“There’s always a problem in announcing scientific results by press release, and that is that you don’t have all the data out there and people aren’t able to really look and think about the data properly,” Sir John Bell, the Regius professor of medicine at Oxford University, told CNBC’s “Closing Bell” on Friday.

Shares of AstraZeneca dipped this week after the company announced interim results from its coronavirus vaccine trials on Monday. The British pharmaceutical giant said its vaccine, which it’s developing alongside Oxford, was 70% effective after it combined results from two different dosing regimes.

One smaller group of people, all under the age of 55, received an unintentionally lower dose of the vaccine followed by a full dose, and a larger group of people received two full doses of the vaccine. The vaccine was found to be 90% effective in the group that received the smaller dose while the larger group showed only 62% effectiveness.

Some U.S. experts, including Moncef Slaoui, chief of the White House’s Operation Warp Speed, said they were concerned about the differing ages between the two groups. Amid those concerns, Pascal Soriot, CEO of AstraZeneca, told Bloomberg on Thursday that the company will likely begin a new study to examine the lower dosage regime.

“The full data will be published in the medical journal so people can examine it. Taking snippets of data is not a helpful way to make an analysis of what’s actually going on,” Bell told CNBC on Friday.

Other British government ministers and experts have also backed AstraZeneca’s vaccine, noting that drug regulators who have more information on the vaccine’s late-stage clinical trials will ultimately have the final say. Britain asked its medicine regulator on Friday to assess the vaccine for a temporary supply, which means the vaccine could be distributed in the country before the end of the year.


That process could take longer in the U.S., however, amid recent concerns. Bell told CNBC that he predicts the UK could be “substantially vaccinated” by spring of next year.

Kate O’Brien, director of immunization, vaccines and biologicals at WHO, agreed with Bell during the organization’s press briefing earlier on Friday, saying that there’s only a “limited amount that can be said in a press release” and that more information, including how well the vaccine builds an immune response, is needed.

“It’s difficult to weigh in on this,” O’Brien said from the WHO’s Geneva headquarters. “From what we understand about the press release, there is certainly something interesting that has been observed, but there are many reasons that could underlie the differences that were observed.”

Dr. Soumya Swaminathan, WHO’s chief scientist, concurred and said AstraZeneca’s trial figures “are still too small to really come to any definitive conclusions.” Less than 3,000 trial participants were in the group that was given the smaller dose of the company’s vaccine compared with more than 8,000 in the larger group.

“If we are to explore this hypothesis of having perhaps a better efficacy with the lower dose, then it would need a trial,” Swaminathan said.

Newsletter

Related Articles

0:00
0:00
Close
Satirical Sketch Sparks Political Spouse Feud in South Korea
Indonesia Quarry Collapse Leaves Multiple Dead and Missing
South Korean Election Video Pulled Amid Misogyny Outcry
Asian Economies Shift Away from US Dollar Amid Trade Tensions
Netflix Investigates Allegations of On-Set Mistreatment in K-Drama Production
US Defence Chief Reaffirms Strong Ties with Singapore Amid Regional Tensions
Vietnam Faces Strategic Dilemma Over China's Mekong River Projects
Malaysia's First AI Preacher Sparks Debate on Islamic Principles
White House Press Secretary Criticizes Harvard Funding, Advocates for Vocational Training
France to Implement Nationwide Smoking Ban in Outdoor Spaces Frequented by Children
Meta and Anduril Collaborate on AI-Driven Military Augmented Reality Systems
Russia's Fossil Fuel Revenues Approach €900 Billion Since Ukraine Invasion
U.S. Justice Department Reduces American Bar Association's Role in Judicial Nominations
U.S. Department of Energy Unveils 'Doudna' Supercomputer to Advance AI Research
U.S. SEC Dismisses Lawsuit Against Binance Amid Regulatory Shift
Alcohol Industry Faces Increased Scrutiny Amid Health Concerns
Italy Faces Population Decline Amid Youth Emigration
U.S. Goods Imports Plunge Nearly 20% Amid Tariff Disruptions
OpenAI Faces Competition from Cheaper AI Rivals
Foreign Tax Provision in U.S. Budget Bill Alarms Investors
Trump Accuses China of Violating Trade Agreement
Gerry Adams Wins Libel Case Against BBC
Russia Accuses Serbia of Supplying Arms to Ukraine
EU Central Bank Pushes to Replace US Dollar with Euro as World’s Main Currency
Chinese Woman Dies After Being Forced to Visit Bank Despite Critical Illness
President Trump Grants Full Pardons to Reality TV Stars Todd and Julie Chrisley
Texas Enacts App Store Accountability Act Mandating Age Verification
U.S. Health Secretary Ends Select COVID-19 Vaccine Recommendations
Vatican Calls for Sustainable Tourism in 2025 Message
Trump Warns Putin Is 'Playing with Fire' Amid Escalating Ukraine Conflict
India and Pakistan Engage Trump-Linked Lobbyists to Influence U.S. Policy
U.S. Halts New Student Visa Interviews Amid Enhanced Security Measures
Trump Administration Cancels $100 Million in Federal Contracts with Harvard
SpaceX Starship Test Flight Ends in Failure, Mars Mission Timeline Uncertain
King Charles Affirms Canadian Sovereignty Amid U.S. Statehood Pressure
Trump Threatens 25% Tariff on iPhones Amid Dispute with Apple CEO
Putin's Helicopter Reportedly Targeted by Ukrainian Drones
Liverpool Car Ramming Incident Leaves Multiple Injured
Australia Faces Immigration Debate Following Labor Party Victory
Iranian Revolutionary Guard Founder Warns Against Trusting Regime in Nuclear Talks
Macron Dismisses Viral Video of Wife's Gesture as Playful Banter
Cleveland Clinic Study Questions Effectiveness of Recent Flu Vaccine
Netanyahu Accuses Starmer of Siding with Hamas
Junior Doctors Threaten Strike Over 4% Pay Offer
Labour MPs Urge Chancellor to Tax Wealthy Over Cutting Welfare
Publication of UK Child Poverty Strategy Delayed Until Autumn
France Detains UK Fishing Vessel Amid Post-Brexit Tensions
Calls Grow to Resume Syrian Asylum Claims in UK
Nigel Farage Pledges to Reinstate Winter Fuel Payments
Boris and Carrie Johnson Welcome Daughter Poppy
×