From Dan Kahneman: Thinking, Fast and Slow

THE ILLUSION OF VALIDITY

p.221

SPEAKING OF ILLUSORY SKILL

“She is a hedgehog. She has a theory that explains everything, and it gives her the illusion that she understands the world.”
#FreshAirNHS #COVIDisAirborne

Transmission of SARS-CoV-2: implications for infection prevention precautions
'Scientific Brief' @WHO https://www.who.int/news-room/commentaries/detail/transmission-of-sars-cov-2-implications-for-infection-prevention-precautions

Before 05:00AM today I hadn't read this.

Have you?
#FreshAirNHS #COVIDisAirborne

‘Transmission of SARS-CoV-2 can occur through direct, indirect, or close contact with infected people through infected secretions such as saliva and respiratory secretions or their respiratory droplets, which are expelled when an infected person coughs, sneezes, talks or sings.’

'Respiratory droplets are >5-10 μm in diameter whereas droplets <5 μm in diameter are referred to as droplet nuclei or aerosols.'

Resp droplet transmission can occur when...in close contact (<1 m) with an infected person who has...symptoms (coughing/sneezing) or who is talking/singing; in these circs, respiratory droplets that include virus can reach the mouth, nose/eyes of a...person+..result in infection.

Comment: Clearly a virion either knows that a cough/sneeze has occurred (to be infectious such ballistic droplets must contain live virus) to jump on/remain on board. Or, if virions are w/o agency, physical laws dictate this behaviour.
Obv madness: I’ll come back to this later.

'Indirect contact transmission involving contact of a susceptible host with a contaminated object or surface (fomite transmission) may also be possible (see below).'

Airborne transmission: the spread of an infectious agent caused by the dissemination of droplet nuclei (aerosols) that remain infectious when suspended in air over long distances+time. Airborne transmission of SARS-CoV-2 can occur during medical procedures that generate aerosols.

Comment: Clearly, a virion either knows that a medical procedure-related AGP has occurred (to be infectious such aerosols must contain live virus) so it jumps on/remains on board, or if virions are without agency, physical laws completely dictate this behaviour.

WHO, together with the scientific community, has been actively discussing+evaluating whether SARS-CoV-2 may also spread through aerosols in the absence of aerosol generating procedures, particularly in indoor settings with poor ventilation.

IMO WHO=in a crisis of anchoring bias.

Ref 17: 'The simultaneous detection of viral RNA in small,
airborne-sized (<4.7 mm) and large, droplet-sized
(≥4.7 mm) particles produced on breathing and
coughing by children and adults with symptomatic
respiratory infections was observed in this study.'
(cont'd)...

'Viruses detected included hRV, Influenza A virus,
Parainfluenza 1 and 3 viruses and RSV'
(cont'd) https://pubmed.ncbi.nlm.nih.gov/23959825/ 

'When samples from all viral RNA positive participants were pooled and considered, viral RNA produced on breathing and coughing was detected on all six stages of the Andersen Sampler.'
(cont'd)

'The observation of similar rates of detection from 10 min of breathing compared with 10 coughs, involving 2–5 min of breathing, may indicate that breathing alone is an unappreciated source of virus...cont'd