Influenza (flu) is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. Learn about flu, including symptoms, prevention methods, and treatment …

4 days ago · Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from the …

In healthy individuals, influenza is typically self-limiting and rarely fatal, but it can be deadly in high-risk groups. In a typical year, five to 15 percent of the population contracts influenza. …

Oct 11, 2022 · What is the flu (influenza)? The flu is an illness you get from the influenza virus. It causes symptoms like head and body aches, sore throat, fever and respiratory symptoms, …

Feb 28, 2025 · Seasonal influenza (the flu) is an acute respiratory infection caused by influenza viruses. It is common in all parts of the world. Most people recover without treatment. Influenza …

3 days ago · Influenza is caused by viruses in the family Orthomyxoviridae. Learn more about the classification of influenza viruses, influenza outbreaks, and influenza symptoms and treatment.

Nov 21, 2025 · A new variant of influenza H3N2 is spreading in other countries. But that could mean the U.S. is in for a rough flu season. The mutated strain, known as subclade K, is …

Seasonal influenza, or flu, is a highly contagious respiratory illness caused by influenza viruses that infect the nose, throat and lungs. The two main types of influenza viruses—types A and …

Nov 26, 2025 · Learn the key symptom differences between flu strains, which is more dangerous, and how the vaccine protects you from both Flu A and B, per experts.

Influenza (flu), also referred to as seasonal flu, is a highly contagious respiratory illness caused by influenza viruses. Anyone can get the flu as it is spread easily from person to person, usually …