| 摘要 |
The present invention provides vaccines containing inactivated avian infectious bronchitis virus VLO 10110/AVI/9 and/or an inactivated virus strain serologically related thereto the immune response to which in birds is enhanced by "priming" with a live heterologous strain of avian infectious bronchitis virus. Immunisation of poultry against infectious bronchitis using such a vaccine does not require initial vaccination or "priming" of the poultry with a live vaccine of the same strain, thus enabling "priming" to be effected using a well-tried conventional live heterologous vaccine, for example a live vaccine to an avian infectious bronchitis virus of the Massachusetts serotype. |
