objectives

history

most imporatnt that we need to know

ABO grouping

• scientist took blood from him and 5 other
  • mixed them to see what happens
  • 1900

a genral rule:

• you cannot express the antigen and antibody at the same time
• presence of either implies abnormality

this is focused on ABO grouping

a lady delivered baby and was bleeding

• they took a sample from her husband according to ABO. but this lead to issues
• the RHD was the issue (notcompatible)