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  • Inferences about spatiotemporal variation in dengue virus transmission are sensitive to assumptions about human mobility

Inferences about spatiotemporal variation in dengue virus transmission are sensitive to assumptions about human mobility

A case study using geolocated tweets from Lahore, Pakistan

Kraemer, M. U. G., Bisanzio, D., Reiner, R. C., Zakar, R., Hawkins, J. B., Freifeld, C. C., Smith, D. L., Hay, S. I., Brownstein, J. S., & Perkins, T. A. (2018). Inferences about spatiotemporal variation in dengue virus transmission are sensitive to assumptions about human mobility: A case study using geolocated tweets from Lahore, Pakistan. EPJ Data Science, 7, [16]. https://doi.org/10.1140/epjds/s13688-018-0144-x

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Abstract

Billions of users of mobile phones, social media platforms, and other technologies generate an increasingly large volume of data that has the potential to be leveraged towards solving public health challenges. These and other big data resources tend to be most successful in epidemiological applications when utilized within an appropriate conceptual framework. Here, we demonstrate the importance of assumptions about host mobility in a framework for dynamic modeling of infectious disease spread among districts within a large urban area. Our analysis focused on spatial and temporal variation in the transmission of dengue virus (DENV) during a series of large seasonal epidemics in Lahore, Pakistan during 2011-2014. Similar to many directly transmitted diseases, DENV transmission occurs primarily where people spend time during daytime hours, given that DENV is transmitted by a day-biting mosquito. We inferred spatiotemporal variation in DENV transmission under five different assumptions about mobility patterns among ten districts of Lahore: no movement among districts, movement following patterns of geo-located tweets, movement proportional to district population size, and movement following the commonly used gravity and radiation models. Overall, we found that inferences about spatiotemporal variation in DENV transmission were highly sensitive to this range of assumptions about intra-urban human mobility patterns, although the three assumptions that allowed for a modest degree of intra-urban mobility all performed similarly in key respects. Differing inferences about transmission patterns based on our analysis are significant from an epidemiological perspective, as they have different implications for where control efforts should be targeted and whether conditions for transmission became more or less favorable over time.

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Donal Bisanzio

Donal Bisanzio

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