Puppy Vaccination Schedule 2026: AAHA & AVMA Canine Guidelines (USA)
Bringing home a puppy in the United States? Vaccination timing is one of the single most important decisions you will make in the first 16 weeks. This guide follows the AAHA (American Animal Hospital Association) Canine Vaccination Guidelines and reflects what most US clinics actually do in 2026.
In the US, puppy core (DAPP) vaccines start at 6–8 weeks and are repeated every 3–4 weeks until about 16 weeks of age, usually 3 rounds. The rabies vaccine is given once around 12–16 weeks and is legally required for dogs in nearly every US state. Expect roughly USD 75–250 for the full puppy series at a general clinic; never skip or delay doses without your veterinarian's guidance, since spacing is what builds reliable immunity.
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)
| Age | Core vaccines | Non-core (lifestyle) |
|---|---|---|
| 6–8 weeks | DAPP (Distemper, Adenovirus, Parvovirus, Parainfluenza) #1 | Bordetella (intranasal kennel cough) — often required for puppy class or daycare |
| 10–12 weeks | DAPP #2 | Leptospirosis #1, Lyme #1, Canine Influenza (H3N2/H3N8) #1 if at risk |
| 14–16 weeks | DAPP #3, Rabies (1-year) | Leptospirosis #2, Lyme #2, Canine Influenza #2 |
| 12 months | DAPP booster, Rabies (1- or 3-year per state law) | Annual non-core boosters as needed |
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.
Frequently asked questions
When should I start my puppy's vaccinations in the US?
Start the core DAPP series at 6–8 weeks of age. If your puppy is already older, your veterinarian will begin the series at the first visit and space remaining doses accordingly.
How many rounds of puppy shots are needed?
Typically 3 rounds of DAPP given every 3–4 weeks until about 16 weeks of age, followed by a booster around 12 months. The exact number depends on the age at which the series begins.
Is the rabies vaccine required by law in the US?
Yes. Rabies vaccination for dogs is legally required in nearly every US state, usually given once between 12 and 16 weeks. Some counties or cities have stricter rules, so confirm local requirements with your veterinarian.
How much does the puppy vaccine series cost in the US?
A single core dose usually runs USD 20–60, and the full 3–4 visit series is about USD 75–250 at a general practice clinic. Low-cost clinics and shelters can charge as little as USD 10–30 per shot.
Can I skip or delay a puppy vaccine?
You should not skip or delay doses without veterinary advice. The 3–4 week spacing is designed to overcome fading maternal antibodies; missed or late doses can leave a puppy unprotected against parvovirus and distemper. Talk to your vet if cost or timing is an issue.
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