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. 2012 Apr 3;7(4):e33118. doi: 10.1371/journal.pone.0033118

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Koster 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 properly credited.

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Transmission of Cal/04 between donors infected by nebulized virus and recipients exposed continuously for 4 days. A. Serial viral RNA titers from throat swabs of donors and recipients, and samples of aerosols collected during continuous exposures, measured by single-target RT-qPCR. B. Viral RNA captured on PTFE filters during a 1 hour interval each day after donor ferret infection, and measured by T5000 assay.