A canteen worker at a Canberra (that’s the capital of Australia) high school has been diagnosed with hepatitis A, sparking a mild health scare.

ACT Health says there is a very low risk to the 1,000 students and 100 staff and Lyneham High School but as a precaution is offering vaccines to anyone who might have eaten from the canteen between October 17 and November 4.

"It can potentially be transmitted through food … (but) the risk to people who have eaten at this canteen is also very low," acting ACT chief health officer Andrew Pengilley told reporters in Canberra on Thursday.