EWN writes that infectious disease experts say the closer people are to someone infected with COVID-19, and the more time people spend in close quarters, the higher the risk that the coronavirus will spread from one person to another. Beyond that simple reality, “it is just a matter of reducing risk with increased physical distance”, said Jonathan Reid, a professor of Physical Chemistry at Britain’s Bristol University.
“The further you stand away from someone, the fewer droplets you will be exposed to. One metre only prevents you from being exposed to the largest of droplets; two metres reduces your exposure – but doesn’t make it zero risk.” A study in The Lancet this month found that physical distancing of at least 1m lowers risk of COVID-19 transmission, but that 2m could be more effective. The WHO says keeping a distance of at least one metre helps reduce the risk of the coronavirus spreading in the small liquid droplets that people spray out when they cough, sneeze and talk. These droplets may contain the virus, and “if you are too close, you can breathe in the droplets”, the WHO says.