People who dined at a popular Christchurch restaurant may have been exposed to Hepatitis A.

Photo: Facebook

Canterbury District Health Board said it was offering urgent vaccination to those who dined at or bought takeaway from Madam Woo on St Asaph Street on 15 or 17 January.

People who had done so have been asked to contact the district health board.

The DHB said people have just this week to get the vaccination and prevent the disease from developing.