14-day
2.The AE oil adjuvant inactivated vaccines protective abilities on 6-day chicken embryos and 1-day, 7-day, 14-day and 21-day chicks challenged with AEV VR were tested respectively.
7.Methods: 150 14-day-old chickens were randomly assigned to 3 groups at 50 each. All groups were vaccinated with ND-IBD vaccine on 14th;

