Sunday, March 22, 2020

Coronavirus spread through the air vs on surfaces

I went looking for research on methods of spread of coronavirus, and came up with this interesting study comparing actual spread of SARS in hospital wards with models of airborne only, surfaces only, or some combination. Covid-19 is similar but not identical. They concluded that spread was about 60% through the air / 40% through touch (either surfaces or being touched by medical personnel).

This image shows actual spread in a standard hospital ward, with the bed labeled "1" as the index case.  The other beds are labeled with the probability that its occupant contracted the virus.