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Frequency. 3–5 million severe cases per year [1][2] Deaths. >290,000–650,000 deaths per year [3][4] Influenza, commonly known as " the flu " or just " 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.
Treatments for influenza include a range of medications and therapies that are used in response to disease influenza. Treatments may either directly target the influenza virus itself; or instead they may just offer relief to symptoms of the disease, while the body's own immune system works to recover from infection.
Influenza vaccines, colloquially known as flu shots, are vaccines that protect against infection by influenza viruses. [ 14 ][ 15 ] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. [ 14 ] While their effectiveness varies from year to year, most provide modest to high protection against influenza ...
There were approximately 50,000 excess influenza and pneumonia deaths in the country, or about half of the mortality attributed to the 1920 epidemic. [40] The 1946–1947 flu season was characterized by a previously unheard of phenomenon. The first influenza vaccine came into use in the 1940s.
This is a timeline of influenza, briefly describing major events such as outbreaks, epidemics, pandemics, discoveries and developments of vaccines. In addition to specific year/period-related events, there is the seasonal flu that kills between 250,000 and 500,000 people every year and has claimed between 340 million and 1 billion human lives ...
Reasonably effective ways to reduce the transmission of influenza include good personal health and hygiene habits such as: not touching your eyes, nose or mouth; [6] frequent hand washing (with soap and water, or with alcohol-based hand rubs); [6] covering coughs and sneezes; avoiding close contact with sick people; and staying home yourself if you are sick.
The following are list of bioCSL flu vaccine brands: [31] Trivalent. Afluria, also marketed as Enzira, Fluvax, and Nilgrip in various different markets. Agrippal, also marketed as Begripal, Fluazur, Sandovac, Agriflu, and Chiroflu in various different markets. Fluad, [32][1] also marketed as Chiromas in Spain.
Influenza viruses A and B are estimated to have diverged from a single ancestor around 4,000 years ago, while the ancestor of influenza viruses A and B and the ancestor of influenza virus C are estimated to have diverged from a common ancestor around 8,000 years ago. [41] Outbreaks of influenza-like disease can be found throughout recorded history.