GUMBORO I vaccine, also known as Infectious Bursal Disease (IBD) vaccine, is a live, freeze-dried vaccine used to immunize chickens against Gumboro disease. An intermediate strain utilised against Infectious Bursal Disease for both initial and booster vaccinations, it is designed for chickens with low to moderate levels of maternally derived antibodies (MDA). Administered via drinking water. The optimal age for vaccination depends on the MDA levels in the flock.