Anemia is when you have low levels of red blood cells. When this happens, your organs and tissues have a harder time getting oxygen. You may feel fatigue, weakness, and shortness of breath.

Anemia of chronic disease is caused by long-term underlying health conditions, such as autoimmune disorders, that affect your body’s ability to make red blood cells. If you have anemia ...

which prevented healthy red cells from forming and led to severe anemia." Castruccio Castracani and his team developed a lentiviral vector that activated the human ALAS2 gene in erythroid cells ...