Influenza (seasonal) - World Health Organization (WHO) 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 Signs and symptoms
Influenza (seasonal) - World Health Organization (WHO) Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world It is characterized by a sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat and a runny nose The cough can be severe and can last two or more weeks
Influenza - World Health Organization (WHO) Influenza is usually mild and uncomplicated and most people recover without medical treatment However infection with influenza may occasionally cause severe disease and death, particularly among the elderly, pregnant women, very young children and persons with certain medical conditions (including chronic heart, lung, kidney, liver, blood or
Flu (influenza) Guide: Causes, Symptoms and Treatment Options - Drugs. com Influenza virus is very contagious Most influenza cases occur during epidemics Epidemics usually peak during the winter months A particularly widespread and severe epidemic is called a pandemic Compared with other viruses, influenza can strike remarkably large numbers of people in a relatively short time
The burden of Influenza - World Health Organization (WHO) Influenza, or the flu, is both a seasonal and a pandemic virus Every year, mainly during the winter season, seasonal influenza infects as many as 1 billion people This makes it one of the most common infectious respiratory viruses, after the common cold Thankfully, the WHO Global Influenza Surveillance and Response System, or GISRS, monitors what viruses are circulating and twice a year
季节性流感 - World Health Organization (WHO) (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
Influenza seasonal EURO - World Health Organization (WHO) Influenza is an acute viral infection that spreads easily from person to person in any age group and that can cause serious complications in certain risk groups In addition to seasonal epidemics, influenza pandemics can occur when a new influenza virus subtype emerges or when an animal influenza virus begins to spread among humans
Five simple steps to protect against flu - World Health Organization (WHO) In tropical regions, influenza can occur throughout the year, causing outbreaks more irregularly, but prevention is still important Here’s how you can protect yourself, and those around you Get vaccinated Annual vaccination is the most effective way to protect yourself against flu, and serious complications
Influenza - India - World Health Organization (WHO) Influenza viruses are constantly changing, and can infect both humans and animals (birds, pigs, horses) There are several types (namely A, B and C) and subtypes of the Influenza virus In India, both seasonal influenza and avian influenza (in wild birds, poultry) have been widely reported