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Efficacy of rHVT-AI Vector Vaccine in Broilers with Passive Immunity Against Challenge with Two Antigenically Divergent Egyptian Clade 2.2.1 HPAI H5N1 Strains

1 Dec 2012

Abstract excerpt

In countries where avian influenza has become endemic, early vaccination of layer pullets or broilers with classical inactivated vaccines at the hatchery is no longer an option because of interference with passive immunity indirectly induced by the necessary vaccination of the breeders. On the other hand, injection of thousands of chicks from 7 to 10 days old on farms has been determined to be unreliable and,...

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PMID: 23402112
DOI: 10.1637/10172-041012-reg.1

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