If the person receives blood with the wrong antigen, then the body will attach and reject it. (Second option)
Explanation:
No matter the condition of the patient, whether they have a disease or not, when receiving blood, cross-match is always done to ensure that you are getting the right blood that is compatible with your blood. We check for blood type and Rh factor. If you get blood that does not lack the same antigen as your blood type, your immune system will react to the foreign antigen and destroy it, which in turn rejects it. These types of complications can be detected right away, but it can also be very deadly.
