New Hampshire bill tests rabies titer exemptions for some pets

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New Hampshire lawmakers are considering House Bill 1488, a proposal that would let some dogs, cats, and ferrets skip required rabies booster shots if a veterinarian documents antibody titer results showing continued immune response from prior vaccination. As introduced, the bill would allow a one-year exemption issued by the local rabies control authority either through the state’s existing medical-exemption pathway or through a single veterinarian using a baseline titer before vaccination and a second titer 7 to 14 days later to establish that animal’s individual response. Notably, animals exempted through titer testing would not face the isolation, leashing, or muzzling rules that apply to animals exempted for medical reasons. The bill was introduced by Rep. Keith Ammon and, as of March 11, 2026, was sent for interim study rather than advancing immediately. (legiscan.com)

Why it matters: For veterinarians, the proposal sits at the fault line between individualized vaccine risk management and long-standing rabies control policy. Public health and veterinary references generally say rabies antibody titers do not directly correlate with protection closely enough to serve as a legal substitute for revaccination, even though they can show a post-vaccinal immune response. New Hampshire State Veterinarian Mark Prescott told lawmakers the department does not support expanding exemptions on that basis, arguing the testing approach does not provide sufficient evidence of immunity and that lower vaccination rates could raise risk for animals and people. (todaysveterinarypractice.com)

What to watch: The key next question is whether interim study leads to a narrower exemption framework, or whether New Hampshire drops the titer-based concept altogether. (legiscan.com)