Merial VAXXITEK HVT + IBD is a high-technology vector vaccine, the product of Merial R&D, which protects chickens against infectious bursal disease (IBD) and Marek’s disease. Producers only need a single injection, which can be delivered automatically in ovo or in SQ day old birds. Protection continues throughout life and has little or no immunity gap between the end of maternal antibody protection and the onset of immunity. VAXXITEK HVT + IBD is registered in 66 countries around the world.