On Distance Respiratory Virus Transmission : Sate of Evidence

Aim of this work is to verify hypothesis of air-borne transmission on distance related some respiratory and other virus and to compare with actual covid-19 pandemic diffusion. After an analysis of relevant literature involved and submitting an experimental hypothesis a global conclusion is submitted for further research activity. Some peculiarity in Covid-19 diffusion velocity and mortality rate in some high polluted world region Contribute to increase the interest in this topics.