ACT health officials are investigating a cluster of hepatitis A cases in Canberra's South Korean community.
There have been eight cases of the virus in the ACT and Sydney since June.
The cluster of cases comes as South Korea experiences a large outbreak of the virus, with more than 11,000 cases reported in the country this year.
ACT Health said it was working with its counterparts in NSW to investigate the cause of the outbreak.
An ACT Health spokesman said most of the people affected by hepatitis A in recent weeks in Canberra had not reported travelling overseas recently.
"Australia has a low incidence of hepatitis A, and when outbreaks occur, they are linked to consumption of contaminated food products or person-to-person spread," the spokesman said.
"However, at this stage of the investigation, no specific food has been connected to the outbreak."
Symptoms of the virus may include nausea, vomiting, fever and yellowing of the skin, dark urine and pale stools.
"The ACT Health directorate is reminding the South Korean community in Canberra and anyone travelling to South Korea, of the importance of vaccination prior to travel and practicing good hand hygiene to reduce the risk of spread," the spokesman said.
Health officials have recommended at least one dose of a hepatitis A vaccination before travel. Two doses prevent an infection.
Hand washing in soap and water for at least 15 seconds has also been recommended by health officials to help prevent the spread of the virus.