Oxygen saturation less than 90% despite receiving nasal oxygen ≥ 3 L/min or respiratory rate more than 24 breaths per minute The diagnosis of Covid-19 is confirmed based on PCR or lung HRCT Alert patients

Oxygen saturation less than 90% despite receiving nasal oxygen ≥ 3 L/min or respiratory rate more than 24 breaths per minute The diagnosis of Covid-19 is confirmed based on PCR or lung HRCT Alert patients