Description
The use of cloned strains is a great improvement in live avian vaccines against Newcastle disease, since this makes it possible to have available a completely uniform vaccine virus population, with determined characteristics in respect to pathogenicity, minimum postvaccination reactions, absence of neutralisation by passively acquired antibodies and high immunogenic activity. These are the reasons why HIPRAVIAR CLON has been developed. This vaccine can be administered to all types of poultry without manifestations of secondary reactions and little neutralisation by passively acquired antibodies. Therefore, the active immunity conferred is longer lasting than conventional virus vaccines against Newcastle disease.
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