Table 4. Five-day rotation purchasing systems for public mask in South Korea

	Mon.	Tue.	Wed.	Thu.	Fir.	Weekend
Last number of birth year	1,6	2,7	3,8	4,9	5,0	The person who didn`t buy the mask on weekdays
Sales point	Pharmacy, post office, Hanaro mart1)					Pharmacy, Hanaro mart1)
Sales quantity and price	2 units per person per week and 1,500 won per unit

National agricultural cooperative federation mart in Korea. The under 10 years old, over 80 years old, disabled, and long-term care benefits recipients can purchase on their behalf when bring certificates.