Answer:
Anemia is a condition in which you lack enough healthy red blood cells to carry adequate oxygen to your body's tissues. Having anemia can make you feel tired and weak. There are many forms of anemia, each with its own cause. Anemia can be temporary or long term, and it can range from mild to severe.
Includes Diseases: Thalassemia; Iron-deficiency anemia
Symptoms: Fatigue, Lethargyness