Ключевые слова: abo, agglutination, analyzing, background, biology, blood, blue, business, chemistry, concept, donation, factor, group, grouping, health, healthcare, healthy, hematology, hospital, human, immunology, lab, laboratory, malaysia, medical, medicine, method, people, red, research, rh, rhesus, science, serology, shah, slide, technology, test, transfusion, yellow,