Hon Dr MEGAN WOODS: I went through the number of interceptors across Auckland that we are looking at—the Southern, the Central, the Rosedale, and the Western Interceptor. So we are doing a broad sweep across Auckland to be able to identify where cases are. In terms of whether they technically qualify as upstream, I'll need to look at that, but we are looking broadly across Auckland. The patterns where we have seen it emerge fit with where we are seeing positive tests come from, and the fact that we are seeing negative results from the Western Interceptor also fits firmly with the pattern of positive cases we are seeing.