This is where caring counts. We've all seen videos where 'dad reflexes' kick in and someone reacts in micro-seconds to save a kid. Medical staff was getting paid to show up and be on stand-by. They were expecting a broken leg, or other trauma.

Anaphylaxis sets in fast,but not within seconds - we are talking more like a couple of minutes and they can be treated. Adrenaline is one component of the treatment besides other medications (that actually "counteracts" the anaphylactic reaction, Adrenaline more or less is mainly used to buy time and fight the worst symptoms).

Airway management, fluid management, etc. are other things we need to consider.