There's no doubt that the risk of transmission of the SARS-CoV-2 virus drops as the physical distance between people increases - and most countries that have adopted this policy in public spaces have called for a distance of one to two metres to be maintained between people.
However, according to architectural engineers from Penn State University, physical distancing is not enough to curb the spread of infectious aerosols - at least not indoors. The virus is mainly transmitted through direct contact or through droplets suspended in the air (known as aerosols) as a result of coughing, sneezing, breathing, or talking.
Three factors