South Korea's daily COVID-19 cases have risen to the highest level in 105 days.
The country reported 735 new infections on Thursday, staying above the 700-mark for two days in a row.
It's the most cases since January 7th, when the country saw 869 cases.
Of the new cases, 715 were local, and 20 were from overseas.
Seoul and Gyeonggi-do Province both saw more than 200 cases each, with cluster infections popping up at work places, churches and schools.
Two more deaths were reported, bringing the death toll to 1,808.
Health authorities are keeping a close watch on COVID-19 variants from overseas.
From Thursday, those arriving from South Africa or Tanzania are required to quarantine at state-designated facilities for two weeks.
Authorities are also ramping up inoculation efforts.
2 million people have received their first dose as of Thursday, and the goal is to have 3 million people get their first dose by the end of April.
Second round of shots for those aged 75 and older and those in long-term care facilities also kicked off.
"29 additional vaccination centers were opened on Thursday, bringing the total to 204 centers nationwide. We aim to have 264 vaccination centers by the end of April. Second injections also begin on Thursday for senior citizens aged 75 and above, and those admitted to, or working in, long-term care facilities."
The government also said on Thursday it's preparing to rollout Janssen vaccines, as European Medicines Agency confirmed its benefits outweigh the risks.
Authorities are also reportedly collecting clinical data on Russia's Sputnik V vaccine, to monitor its efficacy and safety.
Kim Jae-hee, Arirang News.