New Hampshire bill would allow rabies booster exemptions by titer

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 after prior vaccination. The bill would keep the initial rabies shot requirement, but create a new exemption pathway based on serial titer testing, with annual recertification. Under the bill text, that exemption could be issued by a single licensed veterinarian who performed the titer testing, rather than only through the state’s existing medical exemption process, which now requires additional signoff and is intended for animals whose health would be endangered by vaccination. The bill cleared the New Hampshire House on April 10, 2025, and later received a Senate committee recommendation of “ought to pass with amendment” on June 5, 2025. (bills.nhliberty.org)

Why it matters: For veterinary professionals, the proposal cuts into a long-standing public health consensus that rabies antibody titers should not be used as a substitute for current vaccination when determining booster needs or managing exposures. The National Association of State Public Health Veterinarians says titers do not directly correlate with protection, and AAHA likewise says serologic testing is not considered a substitute for rabies vaccination. New Hampshire State Veterinarian Mark Prescott has warned that current research does not establish a reliable antibody threshold that definitively confirms rabies immunity in domestic animals, raising questions about exposure management, liability, licensing, and how practices would counsel vaccine-hesitant pet parents if the law changes. (nasphv.org)

What to watch: Watch whether the Senate advances the bill and, if it does, whether New Hampshire regulators and veterinary groups move to clarify how exempt animals would be handled after bites, wildlife exposures, and annual certification. (gc.nh.gov)