UPM 93273 selected for production of intermediate-plus IBD vaccine (Image source: Malaysian Vaccines and Pharmaceuticals)
To date, all the IBDV isolated in Malaysia are characterised as the vvIBDV, using both the conventional and molecular techniques. Hence, this could explain the failure of the imported IBD vaccines to confer full protection against the disease. This is because the imported vaccines used are developed using the classical strain of IBDV, which is different from the strains of IBDV of the field challenged
