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. 2015 Dec 8;32(3):405–419. doi: 10.1007/s10453-015-9413-3

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© The Author(s) 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — Linear regression modeling for total reduction in influenza A virus (IAV), porcine reproductive and respiratory virus (PRRSV) and Staphylococcus aureus with the EPI system “on” at various distances from the ground. Least square means of concentration difference of RNA copies/m³ or CFUs/m³ of aerosol by distance of the EPI line to the ground with the Andersen cascade impactor sampler after adding all pathogen particles of all stages. Dashed line indicates the null value. *95 % CI does not include the null value, p value <0.05