Today, the country reported 1,910 new cases.
That's a decline from yesterday, but it's the highest figure yet reported on a weekend.
Normally, case numbers come down on weekends because fewer tests are done.
This is a concern because millions of people are travelling for the Chuseok holiday, many from the capital area to other regions, potentially bringing the virus with them.
The health authorities said Sunday that over 77 percent of daily cases in the past week were in the capital region.
And, they added that 500 testing centers are operating nationwide, 17 of which are located at bus terminals and train stations.
As for the vaccine campaign, over 43 percent of the population have now been fully vaccinated, so the government is going to let people get leftover doses for their second shot, enabling them to get them sooner than the original six-week interval.
You can sign up for an early shot at a hospital or clinic or use applications like Naver or Kakao to make a same-day reservation.
On Saturday alone some 120-thousand people got their second shots earlier than scheduled.
Jang Tae-hyun, Arirang News.