Hepatitis C is a notifiable disease in Ireland. There has been a steady downward trend in notifications in recent years, with 645 notifications received in 2016 compared to a high of 1,538 in 2007.1Where risk factor information was reported, 66% of the cases notified in 2016 hada history of injecting drug use. The proportion of hepatitis C cases attributed to injecting drug use has decreased in recent years (80% in 2014, 72% in 2015), but risk factor data completeness varies from year to year so this trend must be interpreted with caution.