A study released April 22 in The Lancet Respiratory Medicine shows that a booster dose of the Pfizer COVID-19 vaccine provides strong protection, roughly 80% to 90%, in the first few months against hospital admissions and emergency department visits caused by the delta and omicron variants. However, against omicron, this protection wanes over time—even after a third dose.
For this study, the researchers analyzed 11,123 hospital admissions and emergency department visits that did not result in hospital admission for acute respiratory infection. The study focused on Kaiser Permanente patient records in Southern California from December 1, 2021, through February 6, 2022, when both the delta and omicron variants were circulating.
- After 2 doses of the Pfizer COVID-19 vaccine effectiveness against omicron was 41% against hospital admission and 31% against emergency department visits at 9 months.
- After 3 doses, effectiveness against omicron-related hospitalization was 85% at less than 3 months but fell to 55% at 3 months or longer.
- Against emergency department visits that did not result in hospitalization, vaccine effectiveness of 3 doses against omicron was 77% at less than 3 months but fell to 53% at 3 months or longer.
“Although the Pfizer COVID-19 protection levels against omicron after 3 doses are substantially higher than those seen after 2 doses, they are less than those observed for delta or other COVID-19 strains,” Tartof said. “Additional doses of current, adapted, or novel COVID-19 vaccines may be needed to maintain high levels of protection against subsequent waves of COVID-19 caused by omicron or future variants with similar potential to escape protection.”
News
Scientists Discover Why Some COVID Survivors Still Can’t Taste Food Years Later
A new study provides the first direct biological evidence explaining why some people continue to experience taste loss long after recovering from COVID-19. Researchers have uncovered specific biological changes in taste buds that could help [...]
Catching COVID significantly raises the risk of developing kidney disease, researchers find
Catching Covid significantly raises the risk of developing deadly kidney disease, research has shown. The virus was found to increase the chances that patients will develop the incurable condition by around 50 per cent. [...]
New Toothpaste Stops Gum Disease Without Harming Healthy Bacteria
Researchers have developed a targeted approach to combat periodontitis without disrupting the natural balance of the oral microbiome. The innovation could reshape how gum disease is treated while preserving beneficial bacteria. The human mouth [...]
Plastic Without End: Are We Polluting the Planet for Eternity?
The Kunming Montreal Global Biodiversity Framework calls for the elimination of plastic pollution by 2030. If that goal has been clearly set, why have meaningful measures that create real change still not been implemented? [...]
Scientists Rewire Natural Killer Cells To Attack Cancer Faster and Harder
Researchers tested new CAR designs in NK-92 cells and found the modified cells killed tumor cells more effectively, showing stronger anti-cancer activity. Researchers at the Ribeirão Preto Blood Center and the Center for Cell-Based [...]
New “Cellular” Target Could Transform How We Treat Alzheimer’s Disease
A new study from researchers highlights an unexpected player in Alzheimer’s disease: aging astrocytes. Senescent astrocytes have been identified as a major contributor to Alzheimer’s progression. The cells lose protective functions and fuel inflammation, particularly in [...]
Treating a Common Dental Infection… Effects That Extend Far Beyond the Mouth
Successful root canal treatment may help lower inflammation associated with heart disease and improve blood sugar and cholesterol levels. Treating an infected tooth with a successful root canal procedure may do more than relieve [...]
Microplastics found in prostate tumors in small study
In a new study, researchers found microplastics deep inside prostate cancer tumors, raising more questions about the role the ubiquitous pollutants play in public health. The findings — which come from a small study of 10 [...]
All blue-eyed people have this one thing in common
All Blue-Eyed People Have This One Thing In Common Blue Eyes Aren’t Random—Research Traces Them Back to One Prehistoric Human It sounds like a myth at first — something you’d hear in a folklore [...]
Scientists reveal how exercise protects the brain from Alzheimer’s
Researchers at UC San Francisco have identified a biological process that may explain why exercise sharpens thinking and memory. Their findings suggest that physical activity strengthens the brain's built in defense system, helping protect [...]
NanoMedical Brain/Cloud Interface – Explorations and Implications. A new book from Frank Boehm
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 [...]
Deadly Pancreatic Cancer Found To “Wire Itself” Into the Body’s Nerves
A newly discovered link between pancreatic cancer and neural signaling reveals a promising drug target that slows tumor growth by blocking glutamate uptake. Pancreatic cancer is among the most deadly cancers, and scientists are [...]
This Simple Brain Exercise May Protect Against Dementia for 20 Years
A long-running study following thousands of older adults suggests that a relatively brief period of targeted brain training may have effects that last decades. Starting in the late 1990s, close to 3,000 older adults [...]
Scientists Crack a 50-Year Tissue Mystery With Major Cancer Implications
Researchers have resolved a 50-year-old scientific mystery by identifying the molecular mechanism that allows tissues to regenerate after severe damage. The discovery could help guide future treatments aimed at reducing the risk of cancer [...]
This New Blood Test Can Detect Cancer Before Tumors Appear
A new CRISPR-powered light sensor can detect the faintest whispers of cancer in a single drop of blood. Scientists have created an advanced light-based sensor capable of identifying extremely small amounts of cancer biomarkers [...]
Blindness Breakthrough? This Snail Regrows Eyes in 30 Days
A snail that regrows its eyes may hold the genetic clues to restoring human sight. Human eyes are intricate organs that cannot regrow once damaged. Surprisingly, they share key structural features with the eyes [...]
