BEIJING, Oct 15 (Reuters) - China has developed a new and better vaccine for use on birds against the avian influenza strain that scientists fear could cause a global pandemic among humans, state media said on Saturday. The vaccine had the advantage of fighting another common bird disease, as well as the H5N1 influenza strain that has spread from Asia to Europe, state television reported. It identified this as avulavirus APMV-1, also known as Newcastle disease.