The immune system fights off the pathogen by Leukocytes also known as white blood cells. When a pathogen enters the body the immune system becomes alert to it and sends out sends out the Phagocytes (a type of Leukocytes) which engulfs the pathogens.
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They wouldn't ever let you do that unless the patient has moved, deceased or have changed doctor's , If you could get a chance to do that and they caught you , the patient would give you a notice or incase the doctor sended something to her/him and someone else would get the mail , and it could be very important ..hoped this helped
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