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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
Overview 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. But sometimes, influenza and its complications can be deadly.
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.
Influenza - American Academy of Pediatrics
Overview of Influenza Influenza is a contagious respiratory illness caused by influenza viruses, which can cause mild to severe symptoms, leading to hospitalization or death. There are two types of influenza viruses (A and B) that cause seasonal outbreaks each year, otherwise known as the influenza season. Children younger than 5 years old, especially those younger than 2, and children and ...
Influenza (Flu) - Illinois Department of Public Health
Influenza viruses are divided into three types, designated A, B, and C. Influenza types A and B are responsible for epidemics of respiratory illness that occur almost every winter and are often associated with increased rates for hospitalization and death. Influenza type C differs from types A and B ...
Influenza: Causes, Symptoms, Diagnosis, and Treatment
Influenza A is the most dangerous and is responsible for most seasonal epidemics and pandemics. Its ability to mutate rapidly allows it to jump between species, including birds, pigs, and humans.
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