Authorities have launched an investigation into a mass hepatitis A breakout.
The City of Busan said nineteen customers at a restaurant have been diagnosed with hepatitis A between mid-June and early-July.
The city suspects the Chinese salted clams from the restaurant may have been the cause of the breakout and are looking into the correlation.
An official from the city said that authorities are looking into the manufacturer and the distributor of the food; they have also quarantined the affected patients and have come up with preventive measures for future patients.
The name of the restaurant was not released.