Swiss scientists have found that those infected with COVID-19 become infectious 5-6 days before the first symptoms appear.
Until now, scientists and doctors believed that patients with coronavirus begin to infect others one to two days before the first symptoms of the disease appeared.
It is noted that scientists from the Federal Higher Technical School of Zurich published their own research in the medical journal Swiss Medical Weekly.
According to the results of this study, people infected with coronavirus begin to pose a danger to people around much earlier.
вЂњIf you need to establish 90 percent of infections that occurred before the onset of symptoms, then you need to trace the contacts that a person had four days before. Our analysis showed that infected people can transmit the virus five to six days before the onset of the disease, вЂќ said one of the study's authors, Peter Ashcroft.