South Korea reported on Sunday another 606 new cases, the fourth day in a row the number has been in the 600s.
It was down in part because of fewer tests being done on the weekend.
But with the weather warming up and two holidays this month, the authorities are warning that case numbers could rise.
Cases have been concentrated in the greater Seoul area.
But the trend shows around 43 percent of cases are occuring outside the capital area, indicating that the spread is increasingly nationwide.
As for the vaccine campaign, first doses have been given to more than 3.3 million people, which is around 6.6 percent of the population.
There have been 79 deaths among people who've gotten doses, but there's been no causal link shown to the vaccines.