Solo uin each cinco infected people with the coronavirus that causes COVID-19, they do not have symptoms of this disease, according to a study by researchers from the University of Bern (Switzerland) published in the scientific journal ‘PLOS Medicine’.
The team, led by the epidemiologist Nicola Low, analyzed 79 serological studies carried out between March and June and clarifies that the percentage of asymptomatic patients is lower in those carried out in hospitalized patients, so if these cases are not taken into account, go up to 30%.
Given these results, the team concludes that it is unlikely to achieve a herd immunization against COVID-19, something that should be based on a higher percentage of asymptomatic patients.
The study seems to conclude that there is a lower influence than was thought between asymptomatic cases and the transmission of the coronavirus and, on the contrary, a greater influence of presymptomatic patients, that is, those who have not yet presented symptoms after infection but do develop them later.
Research confirms that asymptomatic cases are more common in children than adults, and establishes that along with the most known manifestations in patients with COVID-19, such as cough or respiratory difficulties, others are added, such as loss of taste and smell or the sensation of rigidity.
The study, highlights today the Swiss agency RTS, should not entail changes in the recommendations established to stop contagions, which are from the use of a mask to physical distancing.