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.