Starting from Monday, airline crews and care workers for the elderly and the disabled will be eligible for vaccines.
Since last week, health authorities have been accepting reservations from facilities where airline crews and care workers work.
Some 1,790 facilities have applied and will carry out their vaccinations over the coming days.
But those under 30 will not be included due to caution by the health authorities over the AstraZeneca vaccine.
This concern over side effects also delayed the rollout by three days.
Meanwhile, health authorities on Monday announced that of the 400-thousand people aged 75 and older who have received at least one shot of the vaccine, there have been zero cases of COVID-19 occurring after two weeks of their first shot.
"I'm currently at the Seocho Culture and Arts Center in Seoul which has been transformed into a COVID-19 vaccination site last Thursday.
It's one of the 175 vaccination centers set up in the country, and it will be inoculating 480 people on Monday."
This site in particular focuses on inoculating those aged 75 and older.
Health authorities say that by the end of April, almost a hundred more public facilities will be transforming into inoculation centers.
"In the beginning, we inoculated around 250 people a day, but today we're vaccinating almost twice as many. We're still in our beginning stages, so it's a bit hectic here, but I think once we get used to things, everything will run smoothly."
South Korea's health authorities also announced Monday that they will bring in 7 million more doses of AstraZeneca in May and June, which will first be used to vaccinate those aged 65 and older.
Kim Yeon-seung, Arirang News