High-concentration oxygen therapy for infected persons through oxygen nasal tube is one of the main supportive therapies determined by the World Health Organization. It can help patients seriously affected by the virus, relieve dyspnea and cure respiratory function. Although most patients with newly crowned pneumonia develop only minor diseases, about 14% of the patients are seriously ill and need hospitalization and oxygen therapy, and 5% need to be admitted to intensive care unit.


From: Clinical management of severe acute respiratory infection (SARI) when suspected new coronal pneumonia cases occur; WHO Medium Term Guidelines; 13 March 2020)