[woofie11]

I don't think there is a database of allergic reactions people have had. They just happen and people move on. If the question is narrow enough, e.g., "Has there ever been anaphylaxis in response to a dog named Woofers jumping on a 12-year-old girl in New York's Central Park?" the answer will be "No."

However, there have been plenty of instances of severe asthmatic reactions to dogs in situations in all relevant respects similar to drug/bomb-sniffing animals. And I've seen plenty of allergic reactions to service animals.

People react to different amounts of allergens. For some, it requires direct contact. For others, it's enough to be in vaguely the same room.

Service animals are tougher, since both sides have a disability and medical need. Police dogs should be easier, if not for police generally being power-hungry thugs.