Patent ID: 7037506

Claim:
A method for vaccinating a fowl against viral infection comprising: (a) injecting into an amniotic fluid of a fowl egg a vaccine accelerator factor (VAF) comprising: one DNA construct; said DNA construct comprising a DNA molecule and a vector; said DNA molecule comprising one gene or fragment thereof encoding an antigenic peptide of an avian virus; wherein said DNA construct of said VAF stimulates and accelerates a protective immune response of a viral vaccine against said avian virus where said gene or fragment thereof is coded from; wherein said vector is a plasmid or a viral carrier; wherein said viral carrier is one selected from the group consisting of a bacteriophage, an SV40, an adenovirus, a polyoma virus, a baculovirus, a herpes virus, a vaccinia virus, and a pox virus; wherein said viral vaccine is selected from the group consisting of an attenuated live virus vaccine and an inactivated virus vaccine; and (b) injecting said viral vaccine into said fowl egg before hatch or into said fowl egg at hatch or into the fowl hatched from said egg after hatch at an amount equalled to about 20% of a full dose of said viral vaccine to achieve a same titer as said full dose of said viral vaccine in said fowl.