The physical medium is definitely the air, with biological reference to human breathing, speaking and the respiratory system. Careful hygienic measures, with respect to this medical fact, are needed to slow down and reduce spreading, i.e. all incubator conditions in closed spaces are especially ‚viral‘.
COVID-19 is widely described as being airborne and attached to microparticles of pollution. However some agencies do not want to accept this. https://www.nature.com/articles/d41586-020-02058-1 and https://www.bmj.com/content/370/bmj.m3206
No, except for less than 2 meters if persons in contact are not using mask and proper social distance. For very short period of time it may infect other person through air in close contact.
The physical medium is definitely the air, with biological reference to human breathing, speaking and the respiratory system. Careful hygienic measures, with respect to this medical fact, are needed to slow down and reduce spreading, i.e. all incubator conditions in closed spaces are especially ‚viral‘.
The SARS-CoV-2 (Covid-19) coronavirus belongs to the viruses with relatively large, heavy particles, which prevents transmission over long distances in the air in the absence of mechanical carriers, physical air movement, e.g. strong wind. Therefore, it is assumed in most countries that the distance of SARS-CoV-2 Coronavirus emission by an infected person coughing or sneezing is max. 1.5 - 2 meters.