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. 2017 Oct 25;97(1):303–312. doi: 10.3382/ps/pex292

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© 2017 Poultry Science Association Inc.

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Figure 1. — Vaccine titer trends relative to animal age in experimental and field conditions: titers from the experimental trial are represented by continuous lines color-coded for each group (1 to 4); titers from the field trial are marked by red dots for Mass-like strains and by blue triangles for 1/96 strain, and the overall trend is depicted by red and blue lines, respectively.