The provinces determine which regions will need the vaccine. These predictions are perhaps based on population numbers. From time to time, the level of interest of the population in the vaccine may vary from region to region within the province. The distribution or the prediction of the people's interest in the vaccine might be the root of the problem. Then, the provinces redistribute the vaccine to others. This vaccination campaign is voluntary. We are able to predict most of the challenges, but not all of them.
On November 18th, 2009. See this statement in context.