| When vaccines start | 6–8 weeks of age (American Animal Hospital Association (AAHA) Canine Vaccination Guidelines) |
| Series completion age | Around 16 weeks (AAHA Canine Vaccination Guidelines) |
| Core vaccine combination | DHPP (Distemper, Hepatitis, Parvovirus, Parainfluenza) |
| Legally required vaccine | Rabies (required by law in most US states) (Varies by state and local jurisdiction) |
| Booster frequency after puppy series | Every 1–3 years depending on vaccine type (AAHA Canine Vaccination Guidelines) |
Why Puppy Vaccines Matter
Puppies are born with some immunity passed from their mothers through milk, but that protection fades within the first few weeks of life. Vaccines step in to fill that gap, training the immune system to recognize and fight specific diseases before a puppy is exposed to them in the real world.
Without vaccinations, common illnesses like distemper or parvovirus can be fatal, even in otherwise healthy puppies. The good news is that a straightforward series of shots — given at your veterinarian's office over the first several months of a puppy's life — provides strong, lasting protection for most dogs.
If you're preparing for a new pet, our guide on bringing a dog home for the first time covers what else to expect in those early weeks.
| When vaccines start | 6–8 weeks of age (American Animal Hospital Association (AAHA) Canine Vaccination Guidelines) |
| Series completion age | Around 16 weeks (AAHA Canine Vaccination Guidelines) |
| Core vaccine combination | DHPP (Distemper, Hepatitis, Parvovirus, Parainfluenza) |
| Legally required vaccine | Rabies (required by law in most US states) (Varies by state and local jurisdiction) |
| Booster frequency after puppy series | Every 1–3 years depending on vaccine type (AAHA Canine Vaccination Guidelines) |
Core vs. Non-Core Vaccines
Veterinary organizations divide puppy vaccines into two categories: core and non-core.
- Core vaccines are recommended for virtually every puppy, regardless of lifestyle or location, because the diseases they prevent are widespread, serious, or transmissible to humans.
- Non-core vaccines are given based on a puppy's individual risk — where they live, whether they'll be boarded, and how often they interact with other dogs.
Core vaccine
A vaccine recommended for all puppies regardless of lifestyle because the disease it prevents is serious, widespread, or poses a public health risk.
Non-core vaccine
A vaccine given selectively based on a puppy's geographic location, environment, and individual risk factors as assessed by a veterinarian.
DHPP
A combination vaccine protecting against four diseases: Distemper, Hepatitis (adenovirus), Parvovirus, and Parainfluenza. It is considered a core vaccine for all puppies.
Booster dose
A follow-up vaccine given after the initial dose to strengthen and maintain immunity over time. Puppies typically need several boosters in their first year.
Maternal antibodies
Temporary immunity a puppy receives from its mother's milk. These antibodies fade within weeks, which is why the vaccine series begins so early.
Your veterinarian is the right person to decide which non-core vaccines make sense for your specific puppy. Don't hesitate to ask questions at each visit.
The Standard Puppy Vaccine Schedule
The typical schedule begins when a puppy is 6–8 weeks old and continues with booster doses every 3–4 weeks until around 16 weeks of age. A final booster is usually given at one year, after which most core vaccines are repeated every one to three years depending on the vaccine type and your vet's recommendation.
Here is a general outline of what most vets follow:
| Age | Vaccines Typically Given |
|---|---|
| 6–8 weeks | DHPP combination (first dose), possible Bordetella |
| 10–12 weeks | DHPP (second dose), Leptospirosis (first dose if recommended) |
| 14–16 weeks | DHPP (third dose), Rabies, Leptospirosis booster, Lyme if applicable |
| 12–16 months | DHPP booster, Rabies booster (timing varies by local law) |
The DHPP combination shot covers four diseases in a single injection, which is why it appears at every early visit. Rabies vaccination timing and booster frequency are often governed by local or state law — your vet will know what applies in your area.
~90%
Effectiveness of parvovirus vaccine
Veterinary sources generally report the parvovirus vaccine as highly effective when the full puppy series is completed on schedule.
50 states
US states requiring rabies vaccination
Rabies vaccination is legally mandated for dogs in all 50 US states, though specific requirements vary by locality.
Common Non-Core Vaccines to Know
Depending on where you live and how your puppy will spend their time, your vet may recommend one or more of the following:
- Bordetella (kennel cough): Recommended for puppies that will attend doggy daycare, visit dog parks, or be boarded.
- Leptospirosis: A bacterial disease spread through contaminated water or soil; often suggested for dogs in rural areas or those with access to standing water.
- Lyme disease: Recommended in tick-heavy regions of the US, particularly the Northeast and upper Midwest.
- Canine influenza: Considered for dogs frequently exposed to large groups of other dogs.
Non-core vaccines aren't lesser vaccines — they're simply targeted. A puppy living in a high-tick area benefits just as much from a Lyme vaccine as any puppy benefits from DHPP.
This article is for general informational purposes only and is not a substitute for veterinary advice. Always consult your veterinarian about the right vaccination plan for your individual puppy.