Influence of age and congenital immunity upon immunization with an avian infectious bronchitis vaccine.
D001991:Bronchitis / Q000517:prevention & control*; D018352:Coronavirus Infections; D004194:Disease; D007114:Immunization; D011200:Poultry; D014611:Vaccination; D014612:Vaccines
D014612:Vaccines
BRONCHITIS/prevention and control; FOWLS, DOMESTIC/diseases