Table 1.

Stepwise strategy of social distancing in Korea

	Level 1	Level 2	Level 3
No. of newly confirmed patients (main focus on community)	Less than 50	50 to less than 100	100–200 or more or doubling occurs twice a week
Gathering, meeting, venue	Approved (recommendations for compliance with quarantine regulations)	More than 50 people indoor and/or 100 people outdoor is prohibited	More than 10 people is prohibited
Kindergarten, elementary, middle, and high school	Remote class at school, recommended to maintain 2/3 density on campus	Recommended to maintain the majority of remote classes at school, 1/3 of kindergarten, elementary, and middle school, and 2/3 of high school	Different application depending on the situation of remote classes or closure, and national adjustment
Public agencies and companies	Minimization of density at work through flexible, home-based employment (1/3 of all employees)	Restriction of the number of employees through flexible, home-based employment (1/2 of the total number of employees)	Recommendation to work from home for all other employees