‘Happy Hypoxia’ has been documented between 20% and 25% of all hospitalisations requiring oxygen, pulmonologists say. Hypoxia is a condition that causes oxygen saturation levels to drop below Spo2 level 95, resulting in symptoms like breathlessness or wheezing. However, an increasing number of COVID-19 patients seem to be experiencing a drop in oxygen without any symptoms until Spo2 levels hit 70 or lower, causing a delay in getting medical help. Doctors recommend that COVID-19 patients frequently monitor oxygen levels using a pulse oximeter.