English: The dynamics of TB spread in Olinda. The movement of TB between the foci (red squares) was traced by identifying in a given year the CTs with new cases (black circles) that are nearest-neighbours of the CTs that had new cases in the previous year. The movie shows that the annual movement of the new TB cases keep the high-burden CTs fully connected along the five years analysed. Initially, most of the new cases are located around the sources. This first pattern evolves into subsequent ones that fully connect the foci CTs. This movement reflects a feedback mechanism for the high-burden CTs in the period analysed.