Inactived recombinant avian influenza vaccine, subtype H5Nl, Re-6 strain produced by Dai Hoa Nong Company (China) was imported by Vinavetco. rhis vaccine was sent to the specialized laboratories for testing. The testing results showed that: - It was safe when it was used for vaccination to the raising chicken, duck, muscovy duck herds
- Average HI title for chicken with one vaccination time was 4.9 log2, similarly for duck was 4.2 log2 and for muscovy duck was 3.9 log2. With two vaccination times, this title for duck was 6.6 log2 and for muscovy duck was 5.9 log2
- One vaccination time for 14 days old chicken, protection rate when challenge test with virus clade 1.1 was 70 percent, with clade 2.3.2.1 A
2.3.2.1 B
and 2.3.2.1 C was 100 percent
- Two vaccination times for 14 and 30 days old duck and muscovy duck, protection rate when challenge test with virus clade 1.1
2.3.2.1 A
2.3.2.1 Band 2.3.2.1 C was 100 percent
- The discharge level of virus for the vaccinated poultry was low, while this level was high for unvaccinated poultry.