Answer:
so that you can find a match for their blood type.
Explanation:
Certain blood types don't react well with others and cause their immune system to attack, while other blood types react fine with a certain one. Group o+, for example, can donate to any + blood type.
The emergency room would be better in case its severe
Firstly, I should place the patient in the recovery position. After that, I should activate the EMS, which may include giving him CPR. I should tilt their head and list their chin up, in order to open their airway. If they are still not breathing, I should call the ambulance.