Systematic Veterinary Virology

INACTIVATED VACCINES

• Inactivated IBD vaccines are used to produce high, long-lasting and uniform levels of antibodies in breeding hens that have previously been primed by live vaccine or by natural exposure to field virus during rearing.
• Only healthy birds, known to be sensitised by previous exposure to IBDV, should be vaccinated.
• Used in this way the vaccine should produce such a good antibody response that chickens hatched from those parents will have passive protection against IBD for up to about 30 days of age