A salted clam dish was confirmed to be the cause of a hepatitis A outbreak in Busan.
The city of Busan analyzed some 2,500 customers from the restaurant.
The relative risk rate of the disease of the people who consumed the clam dish appeared to be 114.60 out of some 1,000 people.
The city suspected the salted clam dish to be the cause of the outbreak and has been conducting an epidemiological survey.
Last month, it found the hepatitis A virus from an unopened salted clam package.
As of the 31st of last month, there were 161 confirmed cases of hepatitis A patients in Busan, and 20 people were confirmed to have the pathogen.