Earlier quoted context omitted.
Allergies. You end up with a large segment of the population who sneezes a little bit, which is sort of annoying but sort of okay. You end up with a small segment of the population with asthma attacks, anaphylaxis, and other life-threatening conditions. Universal use of dogs would mean that there would be people who simple cannot travel, ever, anywhere beyond driving distance. There's a small war between extremist do…
I have never heard of any life-threatening allergic reaction to any drug or bomb sniffing dog. Has that actually happened? If so...how, when, and where?
Anaphylaxis is a very rare response to animal dander, but there have been a few documented instances:
https://www.petful.com/misc/can-pet-allergies-kill-me/
What's amazing is the number of dog owners who don't believe in dog allergies, or who believe their dogs are hypoallergenic due to fur/hair (dander is in the saliva).