South Korea reported 511 new cases of COVID-19 on Tuesday, the daily figure rising by almost 50 cases compared to the previous day.
483 of them were transmitted locally, with around two-thirds from the capital region.
These include cluster infections at a university hospital in Seoul and a missionary center in Gyeonggi-do Province.
There were also outbreaks at a Buddhist temple and a vinyl greenhouse in Gyeongsangbuk-do Province.
Variants from overseas remain a threat as well.
Out of Tuesday's 28 imported COVID-19 cases, more than a third are believed to come from India.
The virus claimed the lives of four more people, raising the death toll to one,879.
As for the vaccine campaign, first doses were given on Monday to another 8,341 people.
However, supply issues remain an issue as not enough doses are arriving on time to meet demand.
Some three.seven million people in South Korea have now received their first dose that's about 7.2 percent of the population.
A little over 2 million people have received the AstraZeneca vaccine, and one.six-six million the shot from Pfizer.
Around 77-thousand people have received their second dose, raising that particular total to just under 600-thousand.
Authorities are hoping fresh batches from AstraZeneca will help vaccinations pick up pace.
Seven.two-three million doses will get delivered throughout South Korea starting Friday, and those waiting for their second dose are expected to be prioritized.
Second doses of the AstraZeneca vaccine are scheduled to start on Friday the same day the first batches are delivered.
Han Seong-woo, Arirang News.