Beautiful Virgin Islands

Tuesday, Jun 24, 2025

UK expands trial to gauge effect of mixing COVID-19 vaccines

UK expands trial to gauge effect of mixing COVID-19 vaccines

A study in the United Kingdom into using different COVID-19 vaccines in two-dose inoculations is being expanded to include shots made by Moderna and Novavax, researchers say.
The trial, known as the Com-Cov study, was first launched in February to look at whether giving a first dose of one type of COVID-19 shot and a second dose of another, elicits an immune response that is as good as using two doses of the same vaccine.

The idea, said Matthew Snape, the Oxford University professor leading the trial, “is to explore whether the multiple COVID-19 vaccines that are available can be used more flexibly”.

The UK and many other countries in Europe are currently using the Oxford-AstraZeneca and Pfizer-BioNTech COVID vaccines in nationwide immunisation campaigns against the coronavirus pandemic.

But reports of very rare blood clots have prompted some governments – including France and Germany – to say the Oxford-AstraZeneca shot should only be given to certain age groups, or that people who have had a first dose of AstraZeneca’s vaccine should switch to a different one for their second dose.

In a briefing about the expansion of the study to include Moderna’s and Novavax’s COVID-19 vaccines, Snape, an associate professor in paediatrics and vaccinology at Oxford, said it will seek to recruit adults aged over 50 who have received their first, or “prime”, vaccination in the past 8-12 weeks.

These volunteers, who will have received either the Oxford-AstraZeneca or Pfizer-BioNTech vaccine, will be randomly allocated to get either the same vaccine or the Moderna or Novavax vaccine for a second dose.

The six new arms of the trial will each involve 175 people, adding a further 1,050 recruits in total, Snape said.

“If we can show that these mixed schedules generate an immune response that is as good as the standard schedules, and without a significant increase in the vaccine reactions, this will potentially allow more people to complete their COVID-19 immunisation course more rapidly,” Snape said.

“This would also create resilience within the system in the event of a shortfall in availability of any of the vaccines.”

Results from the original mixing trial, using Oxford-AstraZeneca and Pfizer-BioNTech shots only, are expected as early as April or May, while results of the second phase should come in July.
Newsletter

Related Articles

Beautiful Virgin Islands
0:00
0:00
Close
“You Have 12 Hours to Flee”: Israeli Threat Campaign Targets Surviving Iranian Officials
Macron and Merz: Europe must arm itself in an unstable world
Germany and Italy Under Pressure to Repatriate $245bn of Gold from US Vaults
Airlines Evaluate Flight Cancellations Amid Escalating US-Iran Tensions
Starmer Invites Innovators to Join Government Talent Scheme
UK Economy’s Strong Opening Quarter Shows Signs of Cooling
Harrods Seeks Court Order to Secure Al Fayed Estate for Victims
BA and Singapore Airlines Cancel Dubai Flights Amid Middle East Tensions
Trump Faces Backlash from MAGA Base Over Iran Strikes
Meta Bets $14 B on Alexandr Wang to Drive AI Ambitions
WATCH: Israeli forces show the aftermath of a massive airstrike at Iran's Isfahan nuclear site
FedEx Founder Fred Smith, ‘Heart and Soul’ of the Company, Dies at 80
Chinese Factories Shift Away from U.S. Amid Trump‑Era Tariffs
Pimco Seizes Opportunity in Japan’s Dislocated Bond Market
Labubu Doll Drives Pop Mart to Status as China’s Most Valuable Toy Maker
Global Coal Demand Defies Paris Accord Goals
We have new information and breaking details to share about what is shaping up to be a historic air campaign tonight
Six Massive Bombs Dropped on Fordow; Trump: 'A Historic Moment for the U.S., Israel, and the World'
Fordow: Deeply Buried Iranian Enrichment Site in U.S.–Israel Crosshairs
United States Conducts Precision Strikes on Iran’s Nuclear Sites
US strikes Iran nuclear sites, Trump says
Pakistan to nominate Trump for Nobel Peace Prize.
BBC Demands Perplexity AI Immediately Stop Using Its Content
Telegram Founder: I Will Leave My Fortune to Over 100 of My Children
Political Turmoil Resurfaces in Belgium Amid Economic Concerns
Fed policymakers divided on timing of interest rate cuts
Trump signals imminent agreement with Harvard University
Inheritance tax referendum alarms Swiss billionaire community
Japan cancels bilateral security meeting amid US defence demands
AI skeptic Emily Bender warns that ‘the emperor has no clothes’
Israel Confirms Assassination of Quds Force Commander in Tehran
16 Billion Login Credentials Leaked in Unprecedented Cybersecurity Breach
Senate hearing on who was 'really running' Biden White House kicks off
Iranian Military Officers Reportedly Seek Contact with Reza Pahlavi, Signal Intent to Defect
FBI and Senate Investigate Allegations of Chinese Plot to Influence the 2020 Election in Biden’s Favor Using Fake U.S. Driver’s Licenses
Vietnam Emerges as Luxury Yacht Destination for Ultra‑Rich
Plans to Sell Dutch Embassy in Bangkok Face Local Opposition
China's Iranian Oil Imports Face Disruption Amid Escalating Middle East Tensions
Trump's $5 Million 'Trump Card' Visa Program Draws Nearly 70,000 Applicants
DGCA Finds No Major Safety Concerns in Air India's Boeing 787 Fleet
Airlines Reroute Flights Amid Expanding Middle East Conflict Zones
Elon Musk's xAI Seeks $9.3 Billion in Funding Amid AI Expansion
Trump Demands Iran's Unconditional Surrender Amid Escalating Conflict
Israeli Airstrike Targets Iranian State TV in Central Tehran
President Trump is leaving the G7 summit early and has ordered the National Security Council to the Situation Room
Taiwan Imposes Export Ban on Chips to Huawei and SMIC
Israel has just announced plans to strike Tehran again, and in response, Trump has urged people to evacuate
Netanyahu Signals Potential Regime Change in Iran
Juncker Criticizes EU Inaction on Trump Tariffs
EU Proposes Ban on New Russian Gas Contracts
×