Table 1.

Management of COVID-19 Patients Based on Disease Severity.

	Definitions	Place of medical care	Points of medical care
Mild	SpO2 > 96 With no evidence of pneumonia	Home Medical institution (elderly, with underlying illness)	Persons should be observed from the day of onset up to 10 days. Symptoms may appear even in asymptomatic carriers. Regularly measure SpO2 in the elderly or in those with underlying illness to detect early progression to moderate or more severe disease. Olfactory and taste disorders are likely to persist.
Moderate I	93 < SpO2 < 96	Medical institution	Careful follow-up is required using respiratory rate and SpO2 as indicators. In patients with decreased SpO2, oxygen administration is started, and drug therapy (a combination of remdesivir and steroids) is recommended. Screening for thrombosis is also performed. Bacterial infections are rare, and the need for antibiotics is assessed on a case-by-case basis.
Moderate II	SpO2 < 93	Medical institution
Severe	Requires artificial ventilation	Advanced medical institution designated under the coordination of prefectures	It is desirable to receive treatment at an appropriate medical institution.

COVID-19, coronavirus disease; SpO₂, percutaneous oxygen saturation