The Korea Centers for Disease Control and Prevention (KCDC) said that it has confirmed that contaminated fermented shellfish was the main culprit behind the hepatitis A outbreak this summer.
The KCDC came to the conclusions after conducting an in-depth epidemiological investigation.
The agency randomly sampled 270 of the 2,178 hepatitis A patients, diagnosed between July 28 and August 24, and surveyed whether they consumed fermented shellfish this summer. It found that 42 percent of the patients had eaten fermented shellfish during the incubation period.
KCDC also found that 80.7 percent of the 26 patients diagnosed with hepatitis A in August also ate fermented shellfish, while discovering Hepatitis A virus genes in 11 batches out of the 18 batches collected after the outbreak.