Saudi Press

Saudi Arabia and the world
Friday, Aug 08, 2025

Moderna Or Pfizer Booster Works Well For Those Vaccinated With J&J: Study

Moderna Or Pfizer Booster Works Well For Those Vaccinated With J&J: Study

The study was conducted on 458 adults who had been vaccinated with one of three US-approved brands (Pfizer, Moderna or J&J) for at least 12 weeks.
People who received Johnson & Johnson's Covid-19 vaccine may benefit from a booster dose of Pfizer or Moderna, preliminary results of a US study published Wednesday showed.

The study, funded by the National Institutes of Health (NIH), was eagerly awaited in the United States because it looked at the possibility of "mixing" vaccines -- using a different vaccine than the initial doses for the booster shot -- which is not currently allowed in the country.

The study was conducted on 458 adults who had been vaccinated with one of three US-approved brands (Pfizer, Moderna or J&J) for at least 12 weeks.

These three groups were each divided into three new groups to receive one of the available vaccines as a booster. The nine groups consisted of about 50 people each.

Researchers then analyzed antibody levels 15 days after the booster shot.

For people originally inoculated with J&J, antibody levels were four times higher after a J&J booster, 35 times higher after a Pfizer booster and 76 times higher after a Moderna booster.

And antibody levels for those who had originally received Moderna shots were higher "irrespective of the booster vaccine administered," when compared with those who had initially received Pfizer or J&J, the study said.

Additionally, "no safety concerns were identified" after booster doses were administered, it found.

The study, which has not yet been peer-reviewed, has several limitations, however.

The number of participants was small, and the immune response could evolve over time, beyond the 15 days observed during the study.

"Important not to get too carried away with the findings," tweeted Peter Hotez, a professor at Baylor College of Medicine.

Results from trials on a second J&J booster shot conducted by the company itself were "impressive," he said.

The NIH study should fuel discussions by a US Food and Drug Administration (FDA) expert committee, which is scheduled to consider applications for a booster dose from Moderna and J&J on Thursday and Friday, respectively.

A booster from Pfizer has already been approved in the United States for certain populations, such as people aged 65 or older, adults with high-risk medical conditions and those in jobs where they are frequently exposed to the coronavirus.
Newsletter

Related Articles

Saudi Press
0:00
0:00
Close
British Labour Government Utilizes Counter-Terrorism Tools for Social Media Monitoring Against Legitimate Critics
WhatsApp Deletes 6.8 Million Scam Accounts Amid Rising Global Fraud
Nine people have been hospitalized and dozens of salmonella cases have been reported after an outbreak of infections linked to certain brands of pistachios and pistachio-containing products, according to the Public Health Agency of Canada
Texas Residents Face Water Restrictions While AI Data Centers Consume Millions of Gallons
Tariffs, AI, and the Shifting U.S. Macro Landscape: Navigating a New Economic Regime
India Rejects U.S. Tariff Threat, Defends Russian Oil Purchases
United States Establishes Strategic Bitcoin Reserve and Digital Asset Stockpile
Thousands of Private ChatGPT Conversations Accidentally Indexed by Google
China Tightens Mineral Controls, Curtailing Critical Inputs for Western Defence Contractors
OpenAI’s Bold Bet: Teaching AI to Think, Not Just Chat
BP’s Largest Oil and Gas Find in 25 Years Uncovered Offshore Brazil
JPMorgan and Coinbase Unveil Partnership to Let Chase Cardholders Buy Crypto Directly
British Tourist Dies Following Hair Transplant in Turkey, Police Investigate
WhatsApp Users Targeted in New Scam Involving Account Takeovers
Trump Deploys Nuclear Submarines After Threats from Former Russian President Medvedev
Germany’s Economic Breakdown and the Return of Militarization: From Industrial Collapse to a New Offensive Strategy
IMF Upgrades Global Growth Forecast as Weaker Dollar Supports Outlook
Politics is a good business: Barack Obama’s Reported Net Worth Growth, 1990–2025
"Crazy Thing": OpenAI's Sam Altman Warns Of AI Voice Fraud Crisis In Banking
Japanese Prime Minister Vows to Stay After Coalition Loses Upper House Majority
President Trump Diagnosed with Chronic Venous Insufficiency After Leg Swelling
Man Dies After Being Pulled Into MRI Machine Due to Metal Chain in New York Clinic
FIFA Pressured to Rethink World Cup Calendar Due to Climate Change
"Can You Hit Moscow?" Trump Asked Zelensky To Make Putin "Feel The Pain"
Nvidia Becomes World’s First Four‑Trillion‑Dollar Company Amid AI Boom
Iranian President Reportedly Injured During Israeli Strike on Secret Facility
Kurdistan Workers Party Takes Symbolic Step Towards Peace in Northern Iraq
BRICS Expands Membership with Indonesia and Ten New Partner Countries
Elon Musk Founds a Party Following a Poll on X: "You Wanted It – You Got It!"
AI Raises Alarms Over Long-Term Job Security
Saudi Arabia Maintains Ties with Iran Despite Israel Conflict
Russia Formally Recognizes Taliban Government in Afghanistan
Mediators Edge Closer to Israel-Hamas Ceasefire Agreement
Emirates Airline Expands Market Share with New $20 Million Campaign
House Oversight Committee Subpoenas Former Jill Biden Aide Amid Investigation into Alleged Concealment of President Biden's Cognitive Health
Amazon Reaches Major Automation Milestone with Over One Million Robots
Meta Announces Formation of Ambitious AI Unit, Meta Superintelligence Labs
China Unveils Miniature Insect-Like Surveillance Drone
Marc Marquez Claims Victory at Dutch Grand Prix Amidst Family Misfortune
Iran Executes Alleged Israeli Spies and Arrests Hundreds Amid Post-War Crackdown
Trump Asserts Readiness for Further Strikes on Iran Amid Nuclear Tensions
Iran's Parliament Votes to Suspend Cooperation with Nuclear Watchdog
Trump Announces Upcoming US-Iran Meeting Amid Controversial Airstrikes
Trump Moves to Reshape Middle East Following Israel-Iran Conflict
NATO Leaders Endorse Plan for Increased Defence Spending
U.S. Crude Oil Prices Drop Below $65 Amid Market Volatility
Explosions Rock Doha as Iranian Missiles Target Qatar
“You Have 12 Hours to Flee”: Israeli Threat Campaign Targets Surviving Iranian Officials
Oman Set to Introduce Personal Income Tax, First in Gulf
Germany and Italy Under Pressure to Repatriate $245bn of Gold from US Vaults
×