How does an aerosol cloud move and dissipate?
Inside vs Outside - What's the difference?
What is so special about outside air? Let's consider some familiar settings:
Outside is the Current Buzz Word
The now familiar comments by Dr. Fauci And other public health officials about social distancing and using a mask to avoid virus transmission has started to evolve. Since mid July "Open the window to get some fresh air" has become a common message from public health and others.
So we are now hearing how opening the window is helpful to improve safety against Covid transmission. It seems like a simple message and quite a logical one
That short phrase “open the window to air out the place” is actually describing the value of ventilation (ie air movement) through the building.
This ventilation moves clean air in while moving air out of the building which may contain floating virus particles.
Once outside, the virus particle concentration becomes so dilute so as to be negligible and therefore no longer a concern for the virus transmission to other humans breathing the air .