In experimental study to evaluate the potency of 6 types of inactivated (Avian influenza vaccines) (one HSNI1 and five H5N2) administered at 7 days old chickens as well as to evaluate the potency of 2 types of inactivated Al-vaccines (one H5N1 and one H5N2) administered at 7 days old ducklings with full dose (0.5 cm s/c). The results revealed that these vaccines were different; all gave mean Haemagglutination inhibition titer varied from 2 to 5.9 log 2 along 5weeks post vaccination using homologous and heterologous antigens. These results declared that once vaccination not enough for the protection HI level against the circulating challenge viruses.