Imagine you have an emergency patient, a loved one, needing blood. You write a Facebook post seeking blood or contact the blood banks. If everything works well, you may get blood in time. Otherwise, the patient's life might be in danger.
Imagine you have an emergency patient, a loved one, needing blood. You write a Facebook post seeking blood or contact the blood banks. If everything works well, you may get blood in time. Otherwise, the patient's life might be in danger.