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22/11/2021 · Deaths. >290,000–650,000 deaths per year. 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.
18/11/2021 · Influenza, commonly known as the flu, is an infectious disease of birds and mammals. It was thought to be caused by comets, earthquakes, volcanoes, cosmic dust, the rising and setting of the sun, vapors arising from the air and ground, or a blast from the stars.
hace 3 días · Influenza vaccines, also known as flu shots, are vaccines that protect against infection by influenza viruses. New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. While their effectiveness varies from year to year, most provide modest to high protection against influenza.
hace 3 días · Spanish flu, also known as the Great Influenza epidemic or the 1918 influenza pandemic, was an exceptionally deadly global influenza pandemic caused by the H1N1 influenza A virus. The earliest documented case was March 1918 in Kansas , United States, with further cases recorded in France, Germany and the United Kingdom in April.
- February 1918 – April 1920
- 25–50 million (generally accepted), other estimates range from 17.4 to 100
hace 4 días · Research has shown that viral illnesses like Ebola, HIV, influenza and SARS affect men and women differently. Ethnic differences. In the US, a greater proportion of deaths due to COVID-19 have occurred among African Americans and other minority groups.
hace 3 días · It is speculated that the flu pandemic of 1890 may have been caused by this spillover event, and not by the influenza virus, because of the related timing, neurological symptoms, and unknown causative agent of the pandemic.
hace 3 días · Influenza viruses spread in the air by coughing and sneezing. Norovirus and rotavirus, common causes of viral gastroenteritis, are transmitted by the faecal–oral route, passed by hand-to-mouth contact or in food or water. The infectious dose of norovirus required to produce infection in humans is less than 100 particles.