How does fetal Hb affect the severity of beta thalassemia?

Updated: May 07, 2021
  • Author: Pooja Advani, MD; Chief Editor: Emmanuel C Besa, MD  more...
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The level of expression of fetal Hb (ie, the expression level of the gamma-globin gene) in red blood cells determines, in part, the severity of the disease. Patients with high fetal Hb have milder disease.

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