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Influenza (Flu) | CDC
Learn about flu, including symptoms, prevention methods, and treatment options.
Influenza - Wikipedia
Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms begin one to four (typically two) days after exposure to the virus and last for about two to eight days.
Influenza (flu) - Symptoms and causes - Mayo Clinic
Influenza viruses are constantly changing, with new strains appearing often. But the vaccines offered each year are made to match the flu virus strains that are most likely to spread that season. The protection these vaccines offer lasts for months in most people.
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).
About Influenza | Influenza (Flu) | CDC
Understanding Influenza Flu is a contagious respiratory illness caused by influenza viruses that infect tissues in the nose, throat, and sometimes the lungs. It can cause mild to severe illness, and at times can lead to death. Getting a flu vaccine has been shown to prevent flu and its severe complications. Flu vaccines are updated yearly.
Influenza (seasonal) - World Health Organization (WHO)
WHO fact sheet on influenza: includes key facts, definition, symptoms, transmission, seasonal epidemics, effects, prevention, WHO response.
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) - NFID
Flu (influenza) is a contagious respiratory illness that can turn serious. Learn flu symptoms, prevention, vaccine facts, and treatment options from NFID.
Influenza A: Symptoms, Treatment, and More - Health
Influenza A often causes fever, cough, and fatigue. This highly contagious virus primarily affects the respiratory system, including your nose, throat, and lungs.
Influenza - IDSA
Influenza (flu) is a viral infection that can be serious and even fatal. It can be prevented with immunization and treated with antivirals. IDSA focuses on both seasonal and pandemic flu.
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