Puppy Vaccination Schedule USA 2026: AAHA-Aligned Guide

Why the AAHA puppy schedule matters

AAHA's canine vaccination guidelines are the most widely adopted vaccine reference among US veterinarians. They are co-developed with practicing veterinarians and updated to reflect current science. The puppy series is built around a biological reality: maternal antibodies that protect young puppies also block vaccine response, and they wear off at different rates between weeks 6 and 16. That is why a single shot cannot guarantee immunity — only a properly spaced series can.

Standard US puppy vaccination schedule (AAHA-aligned)

Core vs non-core vaccines for US puppies

Core (recommended for every puppy): DAPP and Rabies. DAPP protects against canine distemper virus, canine adenovirus type 2, canine parvovirus, and canine parainfluenza. Rabies is required by law in most US states for dogs.

Non-core (based on lifestyle and region): Leptospirosis — increasingly recommended for almost any dog with outdoor or wildlife exposure. Lyme — most relevant in the Northeast, Mid-Atlantic, and Upper Midwest where blacklegged ticks are endemic. Canine Influenza (CIV H3N2 and H3N8) — relevant for dogs in daycare, boarding, dog shows, or travel. Bordetella — often required by daycare, boarding, and grooming facilities.

Rabies law by state — what to know

Rabies vaccination of dogs is legally required in the vast majority of US states. Some states require a 1-year vaccine for the initial dose and a 3-year vaccine thereafter; some allow 3-year vaccines from the first booster. Local jurisdictions can be stricter than the state. Always confirm with your veterinarian — they will know what your county or city requires and will issue the rabies certificate you need for licensing.

Typical US cost ranges for the puppy series

• Single core vaccine dose: USD 20–60 per visit (varies by region and clinic type)
• Full puppy series (3–4 visits): USD 75–250 at most general practice clinics
• Low-cost vaccine clinics and shelters: as low as USD 10–30 per shot
• Spay/neuter, microchip, and deworming are usually billed separately

Costs are highest in major metros (NYC, San Francisco, Boston) and lowest in low-cost community clinics. AAHA-accredited hospitals tend to sit at the higher end because of stricter quality and equipment standards. Many practices bundle the puppy series as a discounted package.

Common side effects and when to call the vet

Most US puppies tolerate vaccines well. Expect mild soreness at the injection site, slight lethargy, and a possible low-grade fever for up to 24 hours — all normal. Call your veterinarian or go to a 24-hour emergency hospital immediately if you see facial swelling, hives, persistent vomiting or diarrhea, difficulty breathing, or collapse within hours of vaccination, as these can indicate an anaphylactic reaction.

Track every shot with PetCare AI

Log each vaccine in PetCare AI's care calendar and get automatic reminders for the next booster. Ask the AI vet assistant lifestyle-specific questions — "Does my Labrador in Massachusetts need a Lyme vaccine?" — and use the in-app finder to locate a nearby AAHA-accredited clinic or low-cost vaccine event. Always confirm your final schedule with your local DVM, who can adjust timing based on breed, health status, and regional disease pressure.