SEOUL -- South Korea is aggressively testing and tracing thousands of people who went to nightclubs in central Seoul, in a bid to prevent an explosion of infections from a new coronavirus cluster.
Authorities use technology and police officers to help identify potential victims

A medic takes test samples for the coronavirus from a visitor at a testing station in the nightlife district of Itaewon in Seoul on Tuesday. © AFP/Jiji
SEOUL -- South Korea is aggressively testing and tracing thousands of people who went to nightclubs in central Seoul, in a bid to prevent an explosion of infections from a new coronavirus cluster.