New! Sign up for our free email newsletter.
Reference Terms
from Wikipedia, the free encyclopedia

Avian flu

Avian flu (also "bird flu", "avian influenza", "bird influenza"), means "flu from viruses adapted to birds", but is sometimes mistakenly used to refer to both other flu subsets (such as H5N1 flu) or the viruses that cause them (such as H5N1).

"Bird flu" is a phrase similar to "Pig flu", "Dog flu", "Horse flu", or "Human flu" in that it refers to an illness caused by any of many different strains of flu viruses such that the strain in question has adapted to the host. "Avian flu" differs in being named after an entire vertebrate class with 8,800–10,200 species. All known avian flu viruses belong to the species of virus called Influenza A virus. All subtypes (but not all strains of all subtypes) of Influenza A virus are adapted to birds, which is why for many purposes avian flu virus is the Influenza A virus (note that the "A" does not stand for "avian").

Related Stories
 


Health & Medicine News

January 18, 2026

While social media continues to circulate claims linking acetaminophen to autism in children, medical experts say those fears distract from a far more serious and proven danger: overdose. Acetaminophen, found in Tylenol and many cold and flu ...
When scientists sent bacteria-infecting viruses to the International Space Station, the microbes did not behave the same way they do on Earth. In microgravity, infections still occurred, but both viruses and bacteria evolved differently over time. ...
A long-running Swedish study has followed adults for nearly five decades, uncovering when physical decline truly begins. Fitness and strength start slipping around age 35, then worsen gradually with age. The encouraging twist: adults who began ...
Thyme extract is packed with health-promoting compounds, but it is difficult to control and easy to waste. Researchers created a new technique that traps tiny amounts of the extract inside microscopic capsules, preventing evaporation and irritation. ...
Researchers have turned artificial intelligence into a powerful new lens for understanding why cancer survival rates differ so dramatically around the world. By analyzing cancer data and health system information from 185 countries, the AI model ...
A simple change in how primary care clinics approach weight management is delivering big public health wins. PATHWEIGH lets patients openly request help and gives doctors the tools to focus entire visits on weight care. In a massive real-world ...
Bamboo shoots may be far more than a crunchy side dish. A comprehensive review found they can help control blood sugar, support heart and gut health, and reduce inflammation and oxidative stress. Laboratory and human studies also suggest bamboo may ...
Moderate video gaming appears harmless, but heavy gaming may take a toll on young people’s health. Researchers found that students gaming more than 10 hours a week had worse diets, higher body weight, and poorer sleep than lighter gamers. Below ...
A new study warns that a widely used eye ointment can damage a popular glaucoma implant. Researchers found that oil-based ointments can be absorbed into the implant’s material, causing it to swell and sometimes break. Patient cases showed damage ...
A vitamin A byproduct has been found to quietly disarm the immune system, allowing tumors to evade attack and weakening cancer vaccines. Scientists have now developed a drug that shuts down this pathway, dramatically boosting immune responses and ...
Tryptophan does far more than help us sleep—it fuels brain chemistry, energy production, and mood-regulating neurotransmitters. But as the brain ages or develops neurological disease, this delicate system goes awry, pushing tryptophan toward ...
New research suggests statins may protect adults with type 2 diabetes regardless of how low their predicted heart risk appears. In a large UK study, statin use was linked to fewer deaths and major cardiac events across all risk levels. Even those ...

Latest Headlines

updated 12:56 pm ET