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Influenza (Flu)

Influenza (Flu) Key facts There are around a billion cases of seasonal influenza annually, including 3–5 million cases of severe illness. It causes 290 000 to 650 000 respiratory deaths annually. Ninety-nine percent of deaths in children under 5 years of age with influenza-related lower respiratory tract infections are in developing countries. Symptoms begin 1–4 days after infection and usually last around a week. Overview 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. Symptoms of influenza include acute onset of fever, cough, sore throat, body aches and fatigue. Treatment should aim to relieve symptoms. People with the flu should rest and drink plenty of liquids. Most people will recover on their own within a week. Medical care may be needed in severe cases and for people with risk factors. There are 4 types of influenza viruses, types A, B, C and D. Influenza A and B viruses circulate and cause seasonal epidemics of disease. Influenza A viruses are further classified into subtypes according to the combinations of the proteins on the surface of the virus. Currently circulating in humans are subtype A(H1N1) and A(H3N2) influenza viruses. The A(H1N1) is also written as A(H1N1)pdm09 as it caused the pandemic in 2009 and replaced the previous A(H1N1) virus which had circulated prior to 2009. Only influenza type A viruses are known to have caused pandemics. Influenza B viruses are not classified into subtypes but can be broken down into lineages. Influenza type B viruses belong to either B/Yamagata or B/Victoria lineage. Influenza C virus is detected less frequently and usually causes mild infections, thus does not present public health importance. Influenza D viruses primarily affect cattle and are not known to infect or cause illness in people. #Influenza #Flu #FluVirus the flu,influenza,flu,vaksin influenza,dayz influenza,how to treat flu at home fast,flu vaccine,why flu vaccine everyyear,how flu vaccine works,spanish flu vaccine,flu,influenza,common flu symptoms,coronavirus symptoms, References 1. Estimates of US influenza-associated deaths made using four different methods. Thompson WW, Weintraub E, Dhankhar P, Cheng OY, Brammer L, Meltzer MI, et al. Influenza Other Respi Viruses. 2009;3:37-49 2. Global burden of respiratory infections due to seasonal influenza in young children: a systematic review and meta-analysis. Nair H, Abdullah Brooks W, Katz M et al. Lancet 2011; 378: 1917–3 ======= 00:00 Key facts 00:49 Overview 02:53 Signs and symptoms 04:37 Epidemiology 05:29 Transmission 06:19 Diagnosis 07:06 Treatment 08:07 Prevention 08:59 Vaccines 09:52 WHO response ======= Our Other Video :    • ADORABLE Kittens Playing with Yarn (Must W...