Study explains fluctuation in blood oxygenation levels in COVID-19 patients

A study published in the journal sheds light in the explanation for  the lack of blood oxygenation detected in many covid 19 patients. The mysterious physio pathological characteristics of COVID 19 that has most baffled the scientific and medical community is what is known as silent hypoxemia or happy hypoxia. Patients suffering this phenomenon ,the cause of which are still unknown have severe pneumonia with markedly decreased arterial blood oxygen levels (known as hypoxemia).