What happens if you mix COVID-19 vaccines, receiving a first dose of one jab and a second dose of a different inoculation? Scientists want to know.
Why? Because mixing doses might give governments more flexibility to stretch available vaccine supplies across populations, ensuring more people get vaccinated and doses won’t go to waste. There’s also speculation that, at least for some of the vaccines, receiving a second dose of a different vaccine might produce a stronger immune response.
Finally, if COVID-19 becomes endemic —as many experts think is likely— and people need frequent booster shots to retain immunity, then it is possible people will need to receive boosters of a different shot than they received initially.
The U.K. government is sponsoring one of the earliest and largest clinical trials of this kind of mixing, which experts call “heterologous dosing.” And the very first preliminary results from that study are in: People who received the Pfizer vaccine followed by the AstraZeneca jab or vice versa, were more likely to experience uncomfortable reactions to the second dose than people who received two doses of the same vaccine, researchers at the University of Oxford reported in a research note published in the peer-reviewed medical journal The Lancet.
These reactions included flu-like symptoms, such as fever, muscle aches, lethargy, and a general feeling of being unwell. The scientists said that none of these side effects were severe, describing them as “mild to moderate.” They also said the symptoms were short-lived, lasting at most a few days and that there had been no other safety concerns so far with mixing the Pfizer and AstraZeneca vaccines.
More frequent and pronounced reactions could lead to higher rates of absenteeism from work on the day after the second inoculation. This could be an important consideration, especially when governments were vaccinating healthcare workers, according to Matthew Snape, a University of Oxford professor of paediatrics and vaccinology who is leading the mixed dose clinical trial. The scientists also cautioned that the study only included people over the age of 50 and that it is possible that younger people might react differently….
News
Scientists Discover a New “Cleanup Hub” Inside the Human Brain
A newly identified lymphatic drainage pathway along the middle meningeal artery reveals how the human brain clears waste. How does the brain clear away waste? This task is handled by the brain’s lymphatic drainage [...]
New Drug Slashes Dangerous Blood Fats by Nearly 40% in First Human Trial
Scientists have found a way to fine-tune a central fat-control pathway in the liver, reducing harmful blood triglycerides while preserving beneficial cholesterol functions. When we eat, the body turns surplus calories into molecules called [...]
A Simple Brain Scan May Help Restore Movement After Paralysis
A brain cap and smart algorithms may one day help paralyzed patients turn thought into movement—no surgery required. People with spinal cord injuries often experience partial or complete loss of movement in their arms [...]
Plant Discovery Could Transform How Medicines Are Made
Scientists have uncovered an unexpected way plants make powerful chemicals, revealing hidden biological connections that could transform how medicines are discovered and produced. Plants produce protective chemicals called alkaloids as part of their natural [...]
Scientists Develop IV Therapy That Repairs the Brain After Stroke
New nanomaterial passes the blood-brain barrier to reduce damaging inflammation after the most common form of stroke. When someone experiences a stroke, doctors must quickly restore blood flow to the brain to prevent death. [...]
Analyzing Darwin’s specimens without opening 200-year-old jars
Scientists have successfully analyzed Charles Darwin's original specimens from his HMS Beagle voyage (1831 to 1836) to the Galapagos Islands. Remarkably, the specimens have been analyzed without opening their 200-year-old preservation jars. Examining 46 [...]
Scientists discover natural ‘brake’ that could stop harmful inflammation
Researchers at University College London (UCL) have uncovered a key mechanism that helps the body switch off inflammation—a breakthrough that could lead to new treatments for chronic diseases affecting millions worldwide. Inflammation is the [...]
A Forgotten Molecule Could Revive Failing Antifungal Drugs and Save Millions of Lives
Scientists have uncovered a way to make existing antifungal drugs work again against deadly, drug-resistant fungi. Fungal infections claim millions of lives worldwide each year, and current medical treatments are failing to keep pace. [...]
Scientists Trap Thyme’s Healing Power in Tiny Capsules
A new micro-encapsulation breakthrough could turn thyme’s powerful health benefits into safer, smarter nanodoses. Thyme extract is often praised for its wide range of health benefits, giving it a reputation as a natural medicinal [...]
Scientists Develop Spray-On Powder That Instantly Seals Life-Threatening Wounds
KAIST scientists have created a fast-acting, stable powder hemostat that stops bleeding in one second and could significantly improve survival in combat and emergency medicine. Severe blood loss remains the primary cause of death from [...]
Oceans Are Struggling To Absorb Carbon As Microplastics Flood Their Waters
New research points to an unexpected way plastic pollution may be influencing Earth’s climate system. A recent study suggests that microscopic plastic pollution is reducing the ocean’s capacity to take in carbon dioxide, a [...]
Molecular Manufacturing: The Future of Nanomedicine – New book from Frank Boehm
This book explores the revolutionary potential of atomically precise manufacturing technologies to transform global healthcare, as well as practically every other sector across society. This forward-thinking volume examines how envisaged Factory@Home systems might enable the cost-effective [...]
New Book! NanoMedical Brain/Cloud Interface – Explorations and Implications
New book from Frank Boehm, NanoappsMedical Inc Founder: This book explores the future hypothetical possibility that the cerebral cortex of the human brain might be seamlessly, safely, and securely connected with the Cloud via [...]
Global Health Care Equivalency in the Age of Nanotechnology, Nanomedicine and Artificial Intelligence
A new book by Frank Boehm, NanoappsMedical Inc. Founder. This groundbreaking volume explores the vision of a Global Health Care Equivalency (GHCE) system powered by artificial intelligence and quantum computing technologies, operating on secure [...]
Miller School Researchers Pioneer Nanovanilloid-Based Brain Cooling for Traumatic Injury
A multidisciplinary team at the University of Miami Miller School of Medicine has developed a breakthrough nanodrug platform that may prove beneficial for rapid, targeted therapeutic hypothermia after traumatic brain injury (TBI). Their work, published in ACS [...]
COVID-19 still claims more than 100,000 US lives each year
Centers for Disease Control and Prevention researchers report national estimates of 43.6 million COVID-19-associated illnesses and 101,300 deaths in the US during October 2022 to September 2023, plus 33.0 million illnesses and 100,800 deaths [...]
