infection of the central nervous system (cns) can cause hypoventilation or
Central nervous system disease Encephalitis is an inflammation of the brain. It is usually caused by a foreign substance or a viral infection. Symptoms of this disease include headache, neck pain, drowsiness, nausea, and fever. If caused by the West Nile virus,[28] it may be lethal to humans, as well as birds and horses.
Hypoxia (medical) Hemoglobin plays a substantial role in carrying oxygen throughout the body,[14] and when it is deficient, anemia can result, causing 'anaemic hypoxia' if tissue perfusion is decreased. Iron deficiency is the most common cause of anemia. As iron is used in the synthesis of hemoglobin, less hemoglobin will be synthesised when there is less iron, due to insufficient intake, or poor absorption.[15]:997â€“999