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Influenza (Flu) | CDC
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 options.
Influenza - Wikipedia
Influenza A virus and influenza B virus circulate in humans and cause seasonal epidemics, and influenza C virus causes a mild infection, primarily in children. Influenza D virus can infect humans but is not known to cause illness.
Influenza (flu) - Symptoms and causes - Mayo Clinic
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 "stomach flu" viruses that cause diarrhea and vomiting. Most people with the flu get better on their own.
Flu (Influenza): Causes, Symptoms, Types & Treatment
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, which can be severe. Flu is most common in winter months, when many people can get sick at once (an epidemic).
Influenza (seasonal) - World Health Organization (WHO)
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 spreads easily between people when they cough or sneeze. Vaccination is the best way to prevent the disease.
Influenza: Causes, Symptoms, Diagnosis, and Treatment
Influenza is not just another cold—it is one of the most persistent and dangerous viral infections in human history, responsible for countless deaths and widespread outbreaks.
Flu is surging nationwide. Hospitalizations nearly doubled in a single ...
Flu activity is at “high” or “very high” levels in 32 states and jurisdictions, based on data from the week ending Dec. 20, the Centers for Disease Control and Prevention reported Tuesday — up...
Influenza | Definition, Symptoms, Treatment, & Prevention | Britannica
Influenza is an acute viral infection of the upper or lower respiratory tract, marked by fever, chills, and a generalized feeling of malaise. Seasonal influenza (the flu) is a major global health concern, causing annual epidemics with millions of severe cases and hundreds of thousands of deaths.
Flu (Influenza): Symptoms, Causes, Treatment, and More
What is the flu? Influenza (the flu) is a common, infectious virus spread by droplets that enter another person’s body. From there, the virus takes hold and begins to develop.
Is the New Flu Variant Causing Worse Symptoms? Doctors Explain
The dominant strain is influenza A H3N2 — specifically, subclade K, which accounts for about 90% of cases. H3N2 is a familiar strain known to cause more severe flu seasons across all age groups.
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