Confusion and apprehension likely factors in NSWâs slow vaccine uptake Weâre sorry, this service is currently unavailable. Please try again later. Dismiss Save Normal text size Advertisement An Australian expert in vaccine uptake says confusion and a lack of confidence are likely factors stopping people in NSW getting the AstraZeneca vaccine. NSW Deputy Premier John Barilaro said on Monday complacency was to blame for the slow uptake of the vaccine, adding that supply had outstripped demand. However, University of Sydney expert Julie Leask cautioned against assuming any single reason was driving people away from getting the shot. Deputy premier John Barilaro says complacency is stopping people having the AstraZeneca vaccine in NSW but health experts have cautioned against making assumptions.