This document analyzes blood typing results from 4 patients: Ms. Brown, Mr. Jones, Mr. Green, and Mrs. Smith. It summarizes the results, identifying Ms. Brown as the focus. Ms. Brown's blood reacted to none of the serum samples, identifying her blood type as O negative. She could safely receive blood from donors with type O blood or donate blood to recipients with any type. The document also compares and contrasts agglutinogens and agglutinins, explaining how they relate to determining blood type. It discusses how blood typing is used in transfusions, transplants, and detecting antibodies in patients.