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 …

Dec 19, 2025 · 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 …

1 day ago · Here's what you need to know about this season's H3N2 flu symptoms, treatment, when to go to the hospital and whether to get vaccinated.

Dec 30, 2025 · The new variant of Influenza A, or H3N2, has been given the nickname 'super flu.' The fast-spreading virus has caused hospitalizations to nearly double in a week, the CDC …

Dec 30, 2025 · Flu season is off to a rough start this year, according to new CDC data. The virus is spreading faster than in previous years and the surge is likely to get worse. Here's what you …

Jan 5, 2026 · Flu continues to visit misery across the US, with all but four states showing high or very high levels of activity as a new virus strain called subclade K continues to spread.

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 …

Feb 28, 2024 · The flu, also called influenza, is a respiratory infection caused by viruses. Each year, millions of Americans get sick with the flu. Sometimes it causes mild illness. But it can …

Nov 19, 2025 · Flu is a contagious respiratory illness that affects the nose, throat and sometimes the lungs. It can cause mild to severe illness and can lead to death. In the United States, flu …

4 days ago · The flu can infect anyone and cause serious complications in healthy people and those at high risk. While hand-washing, mask-wearing and vaccination can help to limit …