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18. Explain why an Rh-negative person does not have a transfusion reaction on the first exposure to Rh-positive blood but does have a reaction on the second exposure. 19. Record your observations of the five demonstration slides viewed. a. Macrocytic hypochromic anemia: b. Microcytic hypochromic anemia: C. Sickle cell anemia:
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18. In first transfusion there are no anti-Rh antibody in the body of the Rh-negative person. But after first transfusion, the body produces anti-Rh antibodies against the Rh factor as body treats Rh factors as an antigen or foreign body. So, after second transfusion, there will be an agglutination reaction and RBCs are clumped.

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