SEOUL, South Korea — South Korea has 121 new confirmed cases of the coronavirus, its first triple-digit daily jump in a week amid concerns about the country easing social distancing restrictions just last week to cope with a weak economy.

The Korea Disease Control and Prevention Agency said Thursday that South Korea’s caseload is now at 25,543 for the pandemic, including 453 deaths.

Hundreds of recent infections have been tied to hospitals in major cities such as Seoul and Busan. Officials are testing 130,000 workers at hospitals, nursing homes and senior facilities in the Seoul metropolitan area hoping to reduce outbreaks.

South Korea has enforced its lowest level of social distancing measures since Oct. 13, allowing high-risk businesses and karaoke bars to reopen and fans to return to professional sports.