Chronic non-oxygen status results in increased symptoms and is considered a risk factor for severely affected patients.

Oxygen deficiency is a common diagnosis. However if the oxygen level falls below a certain point it may cause a serious medical event such as stroke brain hemorrhage (mini-stroke) fat embolism or respiratory depression. Factors that trigger oxygen deficiency include extreme cold and prolonged sleep deprivation.

During the summer season a patient may need more oxygen to avoid mortality than in the winter. When the level is below 5 L out of 5 L oxygen deficiency causes a far more serious condition such as cardiac arrest and brain hemorrhage.

There are many symptoms that can indicate oxygen deficiency including shortness of breath coughing fatigue headache asthmatic reaction and nosebleeds.

Symptoms of oxygen deficiency include hot body temperature numbness headache and burning sensation in the throat.

Oxygen deficiency can cause severe effects such as in extreme cold sinus pain gum disease and mouth bone eruption. Symptoms of oxygen deficiency during pregnancy especially among people around the time of pregnancy can be more of a problem.

According to WHO oxygen deficiency is a leading cause of death and disability globally particularly in children. (See box)

Many 1500-2000 children die from respiratory disease a year according to World Health Organization statistics.

COVID-19 infection rate (epidemiological)COVID-19 is a disease that can affect hundreds of thousands of people a year. It is associated with profound respiratory abnormalities often called acute COPD which is characterized by shortness of breath cough fatigue and headaches.

In fact patients who have fallen victims of these diseases have a high risk of dying. People in this category of severe disease are at a high risk of dying and with reduced oxygen levels these patients will need more oxygen.

A common symptom of oxygen deficiency is that a person experiences shortness of breath and excessive chest tightness.

A person can develop COVID-19 infection at any age or in certain chronic diseases such as diabetes. Even though acute incidences of COVID-19 may occur more often in elderly African or undernourished people a person is not immune to the disease during the course of the disease which can lead to life-threatening infections.