Great Western Coffee Shop

All across the Great Western territory => The Wider Picture in the United Kingdom => Topic started by: Marlburian on August 01, 2022, 11:26:16



Title: no “safest spot” for passengers to ­minimise risk of Covid
Post by: Marlburian on August 01, 2022, 11:26:16
Daily Mirror (https://www.mirror.co.uk/lifestyle/health/theres-no-safe-spot-train-27622684)


Title: Re: no “safest spot” for passengers to ­minimise risk of Covid
Post by: jamestheredengine on August 03, 2022, 09:19:43
I'm rather of the view that the safest spot is in First Class. Fewer people surely means less risk.


Title: Re: no “safest spot” for passengers to ­minimise risk of Covid
Post by: GBM on August 03, 2022, 10:26:48
I'm rather of the view that the safest spot is in First Class. Fewer people surely means less risk.
Unless it is declassified on a short form!


Title: Re: no “safest spot” for passengers to ­minimise risk of Covid
Post by: stuving on August 03, 2022, 11:45:22
Daily Mirror (https://www.mirror.co.uk/lifestyle/health/theres-no-safe-spot-train-27622684)

If you look at the Mirror's words, they say:
Quote
The researchers, having developed a mathematical model to help predict the risk of disease transmission in a train, found, in the absence of ­effective ventilation systems, the risk is the same along the entire length of the carriage.

So no real trains were harmed, or even used, in this work. And what is "effective ventilation"? Would "good enough to prevent pathogens spreading throughout a carriage" be a reasonable working definition?


Title: Re: no “safest spot” for passengers to ­minimise risk of Covid
Post by: Ralph Ayres on August 03, 2022, 16:59:00
All a bit vague and unhelpful; perhaps the full report was better than the snippets the Mirror picked out.  The implied criticism of recirculating air is somewhat unfair as it makes perfect sense in energy terms rather than constantly trying to heat or cool new air from outside.  Analysis of any benefits of filtering the air while recirculating it might be interesting, and at the risk of kicking off a heated debate I note that wearing a high-quality mask to protect the wearer is suggested when at the height of the pandemic we were told that wearing a mask protected others not ourselves.


Title: Re: no “safest spot” for passengers to ­minimise risk of Covid
Post by: ellendune on August 03, 2022, 17:50:20
All a bit vague and unhelpful; perhaps the full report was better than the snippets the Mirror picked out.  The implied criticism of recirculating air is somewhat unfair as it makes perfect sense in energy terms rather than constantly trying to heat or cool new air from outside.  Analysis of any benefits of filtering the air while recirculating it might be interesting, and at the risk of kicking off a heated debate I note that wearing a high-quality mask to protect the wearer is suggested when at the height of the pandemic we were told that wearing a mask protected others not ourselves.

The gold standard is filtration and UV treatment of air, though UV treatment might be all that is necessary. 


Title: Re: no “safest spot” for passengers to ­minimise risk of Covid
Post by: broadgage on August 03, 2022, 21:01:07
I have previously suggested the UV treatment of air to reduce the spread of infection, in trains and elsewhere.
Germicidal UV lamps are readily available and can be fitted to most types of air conditioning and ventilating equipment.
Any significant direct exposure of persons to the UV light should be avoided as it is dangerous to the eyes and skin.

Germicidal UV lamps may also be fitted to directly irradiate the interior of a railway carriage or other place, this will kill viruses and bacteria exposed to the UV. Care must be taken to ensure that no persons are present when doing this.

Decades ago, I had to replace large numbers of germicidal UV lamps in a hospital laundry, I was under strict instructions to destroy the used lamps by smashing them into a skip, to prevent improper re-use and danger.




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