Answer:
That depends on your definition.
For instance, a proper anaphylactic shock to penicillin (for instance!) kills a person in about a minute.
Caffee coronary, piece of meat lodged at the entrance to larynx kills in about 2–3 minutes.
Myocardial infarction in several minutes.
Stroke in couple of hours at most.
Major epidemic diseases in couple of days.
