@article{8f1b9736815c41fab6d7838a67b77ca0,
title = "Measuring populations to improve vaccination coverage",
abstract = "In low-income settings, vaccination campaigns supplement routine immunization but often fail to achieve coverage goals due to uncertainty about target population size and distribution. Accurate, updated estimates of target populations are rare but critical; short-term fluctuations can greatly impact population size and susceptibility. We use satellite imagery to quantify population fluctuations and the coverage achieved by a measles outbreak response vaccination campaign in urban Niger and compare campaign estimates to measurements from a post-campaign survey. Vaccine coverage was overestimated because the campaign underestimated resident numbers and seasonal migration further increased the target population. We combine satellite-derived measurements of fluctuations in population distribution with high-resolution measles case reports to develop a dynamic model that illustrates the potential improvement in vaccination campaign coverage if planners account for predictable population fluctuations. Satellite imagery can improve retrospective estimates of vaccination campaign impact and future campaign planning by synchronizing interventions with predictable population fluxes.",
author = "Nita Bharti and Ali Djibo and Tatem, {Andrew J.} and Grenfell, {Bryan T.} and Ferrari, {Matthew J.}",
note = "Funding Information: N.B. acknowledges funding support from Branco Weiss The Society in Science, the Bill and Melinda Gates Foundation, and the Huck Institute of Life Science at Penn State University. M.J.F. acknowledges support from the Bill and Melinda Gates Foundation. A.J.T. acknowledges funding support from the RAPIDD program of the Science and Technology Directorate, Department of Homeland Security, and the Fogarty International Center, National Institutes of Health, and is also supported by grants from NIH/NIAID (U19AI089674), the Wellcome Trust (106866/Z/15/Z), and the Bill and Melinda Gates Foundation (OPP1106427, 1032350, OPP1134076). B.T.G. acknowledges funding support from the Bill and Melinda Gates Foundation, the Science and Technology Directorate, Department of Homeland Security (contract HSHQDC-12-C-00058), the RAPIDD program of the Science & Technology Directorate, Department of Homeland Security and the Fogarty International Center, National Institutes of Health. This work forms part of the output of the RAPIDD workshop on Environmental drivers of behavior and disease. Publisher Copyright: {\textcopyright} The Author(s) 2016.",
year = "2016",
month = oct,
day = "5",
doi = "10.1038/srep34541",
language = "English (US)",
volume = "5",
journal = "Scientific reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
}