See:
Aly Ghetas likes the comment:
Mustafa Ezat I appreciate your fast response.With a small flock, say 10,000 birds, with 80% protection, 8,000 birds would be protected and 2000 partially or unprotected, provided adequate vaccination coverage is achieved.These 2000 birds would be leading to the generation of new antigenic variants, this is the risk of not using homologous strains.
Aly Ghetas likes the video:
Brian Jordan (University of Georgia) talked about the Ark99 strain and what was found out during the investigation, regarding mutations in the genome, during IPPE 2018 in Atlanta, USA.
Participation in Forum on April 5, 2017
Dear Dr. Bakri, Did this inactivated vaccine used to protect broilers against H9N2 infections? If yes, what is the best time to vaccinate broilers against H9N2? Sincerely, Aly M. Ghetas
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Location:Misr, Al Qahirah, Egypt
Profile: Academic / scientific
Occupation: Research