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Answer:
One difference between the Rhesus system and the ABO group system is that Rh negative people don't usually possess antibodies against RhD (unless they have been previously exposed to it), whereas in the ABO group system if the antigen is absent from the red blood cells.
Here is the link to read more :)
https://www.mydr.com.au/tests-investigations/blood-typing
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
