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flu often emerges surprisingly with severe symptoms on
Anyone who becomes infected with influenza viruses developsAll of a sudden symptoms like fever with simultaneous chills and feels extremely ill and weakened. Here then usually strict bed rest and protection is indicated, so that the disease can heal quickly, as further measures come - depending on the existing symptoms - for example painkillers, inhalations or various home remedies for fever into consideration. Fear of real flu has been a major concern for many people in the face of severe symptoms - but as British researchers have now discovered, only a small proportion of the cases seem to be that bad at all. However, in 75% of influenza virus-infected patients, the disease would be asymptomatic, according
to Andrew Hayward and his research team from University College London in the journal "The Lancet Respiratory Medicine."
Several hundred households in England accompanied by flu season
For their study, the researchers had in the period from 2006 to 2011, several hundred households in England during the flu season examined and taken in the context of each of the subjects in the spring and autumn blood and this week after weektheir health status. In addition, participants were asked to submit a nasal swab for further investigation in case of symptoms of cold, in order to deduce from the sum of the information, who had actually been infected and how the disease had gone on an individual basis. The scientists came to a surprising conclusion: Although an average of 18 percent of non-vaccinated participants had been infected with influenza viruses each winter, only around one-quarter of those affected showed signs of illness at all. The majority of the subjects, however, had no complaints and thus did not notice that an infection had taken place.
Also in the swine flu many cases remain undetected
Also in 2009, when there was a rapid spread of the H1N1 virus or the so-called "swine flu" in England, the researchers had given an equally high proportion of undiscovered cases: "The seasonal fluand the 2009 pandemic strain were characterized by a similar high proportion of mainly asymptomatic infections. In the population, the 2009 pandemic strain caused even milder symptoms than the seasonal H3N2 flu, "the authors said in their article. According to the researchers, even a small proportion of those affected, despite being infected, consulted a doctor - leading to the conclusion that previous influenza statistics based on family doctor data would underestimate the actual extent of the infections.
Only 16 out of 93 people with confirmed influenza seek GP on
"Most people with a PCR-confirmed influenza did not seek medical attention, and among those who did, influenza or flu-like illness rarely became medicateddocumented. The review of medical records of 93 confirmed by PCR influenza cases in all seasons and of 459 episodes of influenza-like diseases showed that 16 of 93 people with PCR-confirmed influenza( 17%) and 96 of 459 people with an influenza-likeDisease( 21%) had consulted their family doctor, "the researchers said.
Risk of infection from asymptomatic infections much higher than previously thought
Despite the often mild or missing signs of the disease, the flu according to the scientists according to but not play down. On the contrary, precisely because three quarters of the cases remained undetected, the risk of infection was far higher than previously thought. Accordingly, according to Andrew Hayward, these asymptomatic infections would have to be taken into account as part of prevention in order to better and effectively prepare for major influenza pandemics.(nr)