virus subtype h5n1 and h9n2 avian influenza outbreaks in chickens

presentation design poster virus subtype h5n1 h9n2 avian influenza outbreaks chickens genetic antigenic evolution characterization outbreak global spread highly pathogenic report update outbreaks report h5n8 h7 h5 h9 h10 h3 h1 viruses low hpai lpai symptoms sicks poultry oie 3d dead mortality egg drop production