Table 2. Stepwise enhancement or loosening of SD measures according to level of risk assessment index.

Index (last 2 weeks)	SD
	Stage I	Stage II	Stage III
No. of newly confirmed patients (mainly focus on community)	Less than 50	50 to less than 100	100–200 or more or doublinga occurs twice a week
Rate of infections with unidentified route	Less than 5%	-	Sharp increase
No. of cluster outbreaks (based on newly confirmed cases)	Reduction or suppression	Continuous increase	Sharp increase
Management rate within the quarantine network	80% or over	-	-

SD = social distancing.

^aMore than twice the number of confirmed patients per day occurs twice or more within a week.