this post was submitted on 06 Nov 2024
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Salmonella. It's carried in chicken dung, sometimes eggs get a bit of feces on them, so the US washes them to attempt to reduce exposure.
Problem is that without the protective coating, the eggs are more permeable and susceptible to bacterial infection, hence the refrigeration.
So it's a question of whether it's better to reduce bacteria exposure or susceptibility. I am sure there's research out there with numbers indicating one works better than the other, but it's been such a long-standing thing at this point that I don't think Americans would trust unrefrigerated eggs.
The research shows both methods are equally effective at controlling salmonella, afaik
Both work for protecting humans. However, I believe vaccination is better overall. It also improves the quality of life of the chickens. Unfortunately, it's also (very slightly) more expensive, so America went the cheap route. The EU mandated to reduce animal cruelty, by vaccination.