What is the condition characterized by a lack of red blood cells or hemoglobin, resulting in fatigue, weakness, and pallor?

Answer: AnemiaDetail: Anemia is a medical condition characterized by a deficiency of red blood cells or hemoglobin, the oxygen-carrying protein within red blood cells. Common symptoms of anemia may include fatigue, weakness, shortness of breath, pale skin, dizziness, and cold hands and feet. Anemia can be caused by various factors, including nutritional deficiencies, chronic diseases, blood loss, and bone marrow disorders.