This is the prospect raised by the discovery of gene variants that seem to predict whether an individual will produce enough antibodies in response to a vaccine to protect them against disease. (newscientist.com)
If a puppy can not make enough antibodies in time to combat a disease, the disease will overwhelm him. (thehappypuppysite.com)
A test can be falsely negative if the dog is infected but has not yet formed antibodies, or if it never forms enough antibodies to cause a positive reaction. (petpeoplesplace.com)