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. 2021 Feb 21;9(2):182. doi: 10.3390/vaccines9020182

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Antibody titers before and after challenge with NDV challenge strains. HI and ELISA tests were performed before and after the challenge using the homologous strains (CA02, EG14, and TZ12) in sera from control birds and birds vaccinated with LaSota or adeno-F vaccines. HI or ELISA antibody titers in sera samples from the different treatments (control, adeno-F, and LaSota) and NDV challenge strains were compared. Different letters (a, b or c) are statistically significant (p < 0.05). dpv: days post-vaccination, dpc: days post-challenge.