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. 2021 May 19;16(5):e0251517. doi: 10.1371/journal.pone.0251517

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© 2021 Uelmen et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — Overlaid are 1-km diameter hexagons, the observational units used in this study. Northwest Mosquito Abatement District comprises 1,019 of the total 5,345 hexagons in all of Cook and DuPage Counties.