According to the study published on Friday in The Lancet journal, consistent and strong evidence suggest that the SARS-CoV-2 virus, which is responsible for COVID-19, is predominantly transmitted through the air.
The study, led by a team of researchers from the UK, USA and Canada, reviewed published data and found 10 lines of evidence to support the predominance of the airborne route. Of the evidence, the researchers believed that superspreader events like the Skagit Choir outbreak, where 53 people were infected, could not be justified by only close contact infections or touching infected shared surfaces or objects.
Jose-Luis Jimenez, one of the co-authors of the study, said, “The evidence supporting airborne transmission is overwhelming, and evidence supporting large droplet transmission is almost non-existent.” “It is urgent that the World Health Organization and other public health agencies adapt their description of transmission to the scientific evidence so that the focus of mitigation is put on reducing airborne transmission,” he added.
Additionally, the study noted that at least 40 percent of all transmission were a result of silent (asymptomatic or presymptomatic) transmission of SARS-CoV-2 from people who are not coughing or sneezing.
However, the researchers found little to no evidence that the virus spreads through large droplets that settle on the surfaces.

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