WHO advisory is specifically clear that the reporting in recent days that Covid 19 can be an aerosol should not have been interpreted the way it was in media outlets, which is what medicinenet are and have done.
It can be an aerosol, but only under very specific conditions that a person out walking is highly likely to encounter. The researchers set out to aerosolise covid 19, and confirmed once they had done that it could remain in suspension....itís kind an obvious result but does not represent a normal transmission mode.
Standing downwind a few metres from someone sneezing on a windy day might be a tactical error.
Lucky for me Iím a sailor....we always overtake to windward :-)
In an analysis of 75,465 COVID-19 cases in China, airborne transmission was not reported. 8
8. Ong SW, Tan YK, Chia PY, Lee TH, Ng OT, Wong MS, et al. Air, surface environmental, and personal protective equipment contamination by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) from a symptomatic patient. JAMA. 2020 Mar 4 [Epub ahead of print].
Many of those reference links were dated much earlier than the article itself ( which I can understand to a degree ).
In the article I posted, they used nebulizers ( which would lead the reader to believe they were simple ones such as asthmatics use), which would resemble a human cough. The experiments drew the accolades of Dr. Andrew Pekosz, adding further validity to them.
Andrew Pekosz, PhD, codirector of the Center of Excellence in Influenza Research and Surveillance and director of the Center for Emerging Viruses and Infectious Diseases at the Johns Hopkins Center for Global Health, Baltimore, Maryland, applauds the real-world value of the experiments.
Yet the link you posted referred to the nebulizers as
a three-jet Collison nebulizer and fed into a Goldberg drum under controlled laboratory conditions. This is a high-powered machine that does not reflect normal human cough conditions. Further, the finding of COVID-19 virus in aerosol particles up to 3 hours does not reflect a clinical setting in which aerosol-generating procedures are performedóthat is, this was an experimentally induced aerosol-generating procedure.
While I respect WHO as an authority in Covid-19 information and research, I also respect Andrew Pekosz. It's a bit confusing, so I'd rather take my chances with the 2.7 hours ( though I do not want to publicly repeat such if not the case ).