Outbreaks of Avipoxvirus Clade E in Vaccinated Broiler Breeders with Exacerbated Beak Injuries and Sex Differences in Severity by Ruy D. Chacón, Claudete S. Astolfi-Ferreira, Patrícia C. Pereira, Mario S. Assayag, Antony B. Campos-Salazar, David De la Torre, Lilian R. M. de Sá, Sonia R. Yokomizo de Almeida, Rose Elí Grassi Rici, Antonio J. Piantino Ferreira

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