Well theres alot of ways that you can see if a person is dying like if a person's breathing patterns may also be irregular and the Changes in blood pressure, xtremities may feel cold to touch. Hallucinations, delirium, and agitation. An body temperature going up and down that would be another sign of death.
Hope it helps :)
A.) Mononucleosis
Mono s<span>preads by saliva.</span>
Well if they are a slight unconscious then you ask simple questions like. whats the date? do you know your name? things like that but if they are full blown out and can not move talk or anything else then you get help and ask for someone to call 911