That figure is down a little from the six-month high seen last week, but it’s the highest number of cases on a Sunday so far this year, when case numbers usually drop because of less testing.
The country also saw a surge in infections from overseas, reporting 81 cases.
The health authorities are on alert especially over the recent surge in cases in the capital region.
Of Sunday’s 662 locally transmitted cases, 81.4 percent were in the greater Seoul area.
Over the past week, new cases in the Seoul area have accounted for more than 80 percent of the total cases and nearly half of the infected people were in their 20s and 30s.
“I ask the local officials in the greater Seoul area: do whatever you can to prevent the spread of the virus.”
Starting Monday, the nation will be administering the Pfizer vaccine to 197-thousand senior citizens aged 60 to 74 who were eligible to get the AstraZeneca vaccine last month but couldn’t because of supply shortages.
The government will also be inoculating 110-thousand essential workers under the age of 30, including police officers, firefighters and military personnel who were supposed to be vaccinated within the second quarter of this year.
Also from Monday the country will “mix-and-match” the vaccines, meaning those who got a first dose of AstraZeneca can get Pfizer as their second dose.
There was one more COVID-19 related death on Sunday raising the death toll to 2,26.
The total number of cases to date now stands at more than 160-thousand.
Bae Eun-ji, Arirang News.