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Woman with severe allergy ‘left with no choice’ but to buy every packet of peanuts on flight
(www.independent.co.uk)
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this post was submitted on 08 Aug 2023
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The air within an airplane cabin is recirculated every five or ten minutes. A real severe peanut allergy would be triggered by anyone on the plane eating peanuts.
are planes cleansed that thoroughly between flights? I assume one would have to worry about who was eating what in the area from a previous flight with an allergy that severe
No, they are not.
The majority of airplanes are equipped with HEPA filters. As in, removing 99,97% of particles over 0.3 micron in size. The unfiltered air is fed in from the outside. It's pretty clean and not a consideration for allergens like peanut particles.
Source: https://www.nationalgeographic.com/travel/article/how-clean-is-the-air-on-your-airplane-coronavirus-cvd
HEPA filters remove 99.97% of particles that are 0.3 micron in size. (That is the size of particles they're tested with, as it's the most difficult to filter.) They remove over 99.97% of particles larger or smaller than 0.3 microns.
Living with allergies such as a severe peanut allergy is all about mitigating risk
In most open areas you can be cautious about what you touch and who you stand near to. In enclosed spaces such as airplanes, the risk is substantial and mitigating it requires as close to an absence of peanuts as possible
And peanuts are special in how easily they trigger severe reactions. Of all my son's allergies, peanuts are the one that scare us
I would hope the air is filtered before recirculating.
It's sort of is. But mostly they just mix it with a bit of outside air bumped up to pressure and release the difference, but it's not really filtered, except in the sense that over time it will be filtered because the contaminated air will eventually all leave.
I'm sure they have filters like cars have filters but they're not going to remove micro particles.
When did they remove HEPA filters from modern aircraft?
That seems extremely stupid when airplanes are already major disease vectors, especially after covid.
Most aircraft have HEPA filters. This was pretty regularly discussed during covid.
Aircraft ironically actually had cleaner air back when they allowed smoking, because they then actually did have to filter the air.
That just sounds like utter bullshit mate
I assume they filter it in some way, but okay.
Air in a pressurised plane isn't recirculated, it's replaced with new air from outside.
It is recirculated and fresh air is mixed with it.