In response to a question about how we can be sure the rabies vaccine protects against the deadly zoonotic disease, veterinarian Jeff Kahler explains the immune system response to an injected vaccine. Dr. Kahler points out that titers in blood tests that measure the circulating antibody level are reliable indicators of an individual's immunity toward rabies. Extensive testing has given veterinarians confidence that the rabies virus provides adequate protection. While vaccine failures do occur, Dr. Kahler adds, the failure rate of the rabies vaccine is almost nonexistent.
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