Coronavirus, one in eight infected develops the symptoms of long Covid – the Dutch study in The Lancet

Several months after the SARS-CoV-2a sizeable percentage of patients still experience it symptoms due to the disease. To deepen the basic notions of what has been called ‘long Covid’ a study, published in the journal The Lancetconducted by scientists from the University of Groningen who estimated the long-term disease incidence rate and the most common symptoms associated with it. The research group, led by Judith Rosmalenfound that the 21.4 percent of adults who test positive for the infection show at least one symptom later three to five months from the initial diagnosis.

The team estimated the frequency of new or more severe symptoms in a group of patients who tested positive for Covid-19. To compile the statistics, the researchers considered a dataset related to 76,422 participants, 4,231 of which they had contracted the infection. Scholars found that the 21.4 percent of those who tested positive showed at least one symptom three to five months after the test. In the control group, only the8.7 percent of participants appeared to have developed conditions attributable to symptoms associated with Covid-19. In other words, the scientists summarize, one in eight patients in the general population has long-term symptoms of infection.

Among the most frequently reported effects, experts list chest paindifficulty in breathing, pain when breathing, muscle achesloss of taste andsmell, tingling in the extremities, lump in the throat, feeling of hot And coldarms and / or heavy legs And exhaustion. The researchers compared the frequency of new or severely increased symptoms in an uninfected population with people diagnosed with SARS-CoV-2, offering the most reliable estimate currently available for long Covid compared to previous work. For the analysis, conducted in the Netherlands, the team administered the same survey 24 timesasking participants to report their conditions regarding 23 symptoms commonly associated with Covid and long Covid.

“We still have a superficial knowledge of the long-term symptoms of Covid-19 – he explains Rosmalen – our work evaluates a series of symptoms often associated with the disease. We have considered the most common symptoms of the disease in positive people and in a healthy population, which allows us to obtain a more reliable estimate of the frequency of long Covid cases ”. “The long Covid – he adds Aranka Ballering, PhD student at the University of Groningen – poses a significant threat to the population. Understanding the symptoms and frequency of this disease is essential for designing effective intervention strategies “. Further investigations will need to be conducted to understand what the effects of long Covid depend on, and also to consider the effects of the disease on mental health. “These data – he concludes Rachael Evans ofInstitute for Lung Health, at the University of Leicester, which was not involved in the work – support the idea that long Covid can persist for at least two years in patients. The level of knowledge of this problem is still poorly understood, so we hope that the next studies will help us to better understand what the long-term manifestation of these symptoms depends on and how to counter them “.

by Valentina Di Paola

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