This article is interesting, refers to appropriate PPE for healthcare workers, but touches on transmission:
Unmasked: Experts explain necessary respiratory protection for COVID-19
“ How the virus travels in the air
Donald Milton, MD, a professor of environmental health at the University of Maryland, helped prove via the use of his Gesundheit machine that influenza could be spread via aerosol transmission. He said he is in contact with colleagues in Singapore who are attempting to study the transmission of the COVID-19 viruses, which are often called nCoV but are officially named SARS-CoV-2.
Though Chinese officials said earlier this week that they believe the coronavirus is transmitted only via droplets, implying they do not believe airborne or contact transmission plays a role, Milton said that statement is likely rooted in fear, not science.
“To me this sounds like someone trying to deal with panic, because people panic when they hear airborne transmission and long-distance transmission,” he said. He said there has been scientific evidence or aerosol transmission of MERS-CoV (Middle East respiratory syndrome coronavirus), so it is likely possible for this novel coronavirus, as well.
Milton cautions that the difference between aerosol and droplet transmission is largely in name only. Respiratory droplets, emitted with a sneeze or a cough, are commonly thought to land within 6 feet of patients and are too large to be buoyant on air currents. Respiratory aerosols are droplets too, Milton said, but smaller and light enough to travel farther.
“You cannot tell the difference epidemiologically between something aerosol transmitted by weak sources and large droplet spray,” said Milton. “They behave so similar, it’s very hard to pick up the difference.”
He said he suspects the capability of long-distance transmission with COVID-19 will be connected to source strength, or how symptomatic a person is.”
http://www.cidrap.umn.edu/news-perspective/2020/02/unmasked-experts-explain-necessary-respiratory-protection-covid-19
Don’t share air with the infected. And don’t touch them.
I know we're discussing a very serious topic here, but, being of mostly German descent, and hearing "Gesundheit" many a time with family, that really made me laugh! I to this day still say "Gesundheit!" when someone near me coughs or sneezes.
Re: 574 - From the article at the link (and what you also posted:
“He said he suspects the capability of long-distance transmission with COVID-19 will be connected to source strength, or how symptomatic a person is.”