In the UK chickens are vaccinated against salmonella. My understanding is that this is not legally mandated but a compromise by the egg industry to avoid regula

In the UK chickens are vaccinated against salmonella. My understanding is that this is not legally mandated but a compromise by the egg industry to avoid regulation after some major salmonella outbreak a few decades ago. Mandating antibiotic use would be a great way to breed resistant salmonella.