Hon ANDREW LITTLE: Well, as I tried to explain to the member in my answer to his primary question, it is that pharmaceutical procurement requires a lead time and it's done on the basis of the best information at the time and with a forecast for what can be administered, but then things come along, such as a worldwide pandemic, that disrupts the roll-out of particular campaigns. When pharmaceuticals are procured, they are procured on the basis of what is needed at a particular time, but also a buffer for subsequent years, and that buffer can be anything from four to nine months of supply for that particular vaccine.