http://www.rabieschallengefund.org/latest/states-with-medical-exemptions-in-lieu-of-rabies-vaccination
Below is an excerpt from:https://www.avma.org/KB/Policies/Pages/Annual-Rabies-Vaccination-Waiver.aspx
To ensure that the risk to both the individual animal and to public health is considered, a waiver of rabies vaccination should only be issued when a licensed veterinarian with a valid veterinarian-client-patient relationship with the animal and the appropriate public health authorities concur that the waiver should be issued. The client must be informed that, even if a waiver is issued, the waiver only serves to allow the animal to be properly licensed in compliance with animal control regulations. In the event that the animal is involved in a potential rabies exposure incident, the animal should be considered unvaccinated against rabies for the purpose of appropriate public health regulations or when following the recommendations of the NASPHV Compendium of Animal Rabies Prevention and Control. All rabies vaccination waivers should be reconsidered at least yearly and, if appropriate, may be renewed on an annual basis following a reassessment of the animal’s condition.
Although the AVMA supports the existence of a process for issuing waivers of rabies vaccination requirements in every jurisdiction, this policy should not be construed as justification for failing to vaccinate animals for rabies in jurisdictions where such vaccination is required by law and no waiver or delay process exists.
