− | |pagebody = Circoviruses are the smallest known viruses of vertebrates and plants, and cause immunosuppressive infections of pigs, poultry, and parrots. No vaccines are currently available against them. | + | |pagebody = Circoviruses are the smallest known viruses of vertebrates and plants, and cause immunosuppressive infections of pigs, poultry, and parrots (genus circovirus) and chicken anaemia viral disease (genus gyrovirus). No vaccines are currently available against them. |