Dog Vaccination Schedule: Preventing Common Diseases

Quick answer: A dog vaccination schedule usually includes a set of “core” vaccines, plus extra vaccines depending on lifestyle and risk. According to AAHA’s schedule, puppies get at least three doses of the core combination vaccine between 6 and 16 weeks of age, spaced 2 to 4 weeks apart. Adult dogs then get a booster within a year, followed by further boosters at intervals your vet will set. Every dog is different, so use this guide as background for a conversation with your veterinarian, not as a replacement for one.

Vaccines help protect against several serious common dog diseases. Here is how the schedule works, where major veterinary groups agree, and where they differ.

Core vs. Non-Core Dog Vaccines

According to AAHA’s canine vaccination guidelines, core vaccines are recommended for all dogs unless there is a medical reason not to vaccinate. Other vaccines are described as just as essential for some dogs, depending on lifestyle and risk. Those are called non-core vaccines.

AAHA’s core list covers:

• Distemper
• Adenovirus
• Parvovirus
• Rabies
• Leptospirosis (added as core in AAHA’s 2024 update)

Protection against parvo in dogs is one reason the puppy series matters. Parvovirus is one of the diseases the core combination vaccine is designed to prevent.

Puppy Vaccination Schedule

Puppies need several doses, not one. AAHA’s core and non-core vaccine table recommends at least three doses of the combination vaccine (distemper, adenovirus, parvovirus, and sometimes parainfluenza) between 6 and 16 weeks of age, 2 to 4 weeks apart.

WSAVA’s 2024 guidelines agree on the key point: puppies need multiple core doses every 2 to 4 weeks, and the final dose should be given at 16 weeks of age or older. The reason is that antibodies a puppy receives from its mother can interfere with early doses, and the level varies within and between litters. That is why the age at the final dose matters more than the number of visits.

Vaccine Schedule Table

This table summarizes AAHA’s published dog vaccination schedule. Your vet may adjust it for your dog.

AAHA’s table dates from 2022, before leptospirosis became a core vaccine in 2024. Ask your vet to confirm current timing for that vaccine.

Adult Dog Boosters

If your dog finished the puppy series, AAHA’s table calls for a single combination dose within a year after the last dose of that series. After that, the core combination vaccine is given at 3-year intervals. Non-core vaccines usually need annual boosters.

WSAVA suggests revaccinating at or after 26 weeks of age, rather than waiting until 12 to 16 months. This covers the minority of puppies that may still have had interfering maternal antibodies at their 16-week dose. WSAVA also stresses that core vaccines should not be given more often than necessary in adult dogs. It notes that blood antibody testing can be used from 20 weeks of age to confirm a puppy responded to vaccination, and to help set revaccination intervals in adult dogs. Ask your vet whether that makes sense for your dog.

If your adult dog was never vaccinated and is older than 16 weeks, AAHA’s table lists two doses of the combination vaccine, 2 to 4 weeks apart.

Rabies Vaccine: Follow Local Law

Rabies vaccination is often governed by law, and the rules differ by place. AAHA’s table simply says rabies is “as required by law.” A state rabies vaccination laws dataset from the CDC’s Public Health Law Program covers state-level laws only, was last updated in 2018, and advises checking your local jurisdiction because cities and counties may have their own rules. Because it is dated, confirm current requirements with your vet or local authorities.

Keep your dog’s rabies certificate handy, since licensing, boarding, and travel rules may ask for proof.

Lifestyle Vaccines: Bordetella, Influenza, and Lyme

Non-core vaccines are about matching protection to your dog’s life. A dog that spends time around many other dogs has different exposure than a dog that rarely meets any.

Bordetella bronchiseptica is one of the germs linked to kennel cough symptoms, and AAHA’s table lists a single intranasal dose for dogs at risk of exposure, with annual boosters. Canine influenza and Lyme vaccines each use two initial doses and then annual boosters. Ask your vet which of these fit your dog.

Leptospirosis: Where AAHA and WSAVA Differ

This is the vaccine where the two major guidelines currently differ. AAHA’s leptospirosis update moved it from non-core to core in 2024, so AAHA recommends it for all dogs. WSAVA’s 2024 guidelines are more conditional: they call it core where leptospirosis is endemic, the implicated serogroups are known, and suitable vaccines are available.

In practice, ask your vet whether leptospirosis is a concern in your area and how the vaccine fits your dog’s routine.

What If Vaccines Are Late or the History Is Unknown?

AAHA’s table says the benefits of vaccination far outweigh the risks for dogs with unknown immune status or vaccination history. For overdue vaccines, it advises consulting the vaccine manufacturer’s instructions. Don’t guess about restarting or skipping doses. Bring whatever records you have, including shelter or breeder paperwork, and let your vet decide the next step.

Checklist for Your Next Vet Visit

• Bring all vaccine records, including rabies certificates.
• Tell your vet about daycare, boarding, grooming, training classes, and travel.
• Ask which non-core vaccines fit your dog’s lifestyle.
• Ask whether leptospirosis is a concern where you live.
• Ask when each booster is due, and set a reminder.
• Mention any past vaccine reactions or health conditions.

FAQ

Do dogs need vaccines every year?
Not all of them. According to AAHA’s table, core combination boosters are given every 3 years after the first-year booster, while many non-core vaccines are given annually. Rabies follows your local law.

Is the rabies vaccine required?
Rules are set at the state and local level, so check with your vet or local authorities.

Why do puppies need so many doses?
Antibodies from the mother can interfere with early doses, so the series continues until the puppy is at least 16 weeks old.

What if I adopted an adult dog with no records?
Talk to your vet. AAHA says the benefits of vaccinating far outweigh the risks when the history is unknown.

Vaccines Are Prevention, Not Everything

Vaccines protect against specific infectious diseases, not every health problem a dog can face. Dogs can also develop long-term conditions that need ongoing care, and that is a separate planning question from vaccination. If you are starting to think about how to prepare for those costs, our guide to pet insurance for chronic illness explains the options.

This guide is general information, not veterinary advice. Your dog’s vaccination plan depends on age, health, lifestyle, and local law, so confirm the final schedule with your veterinarian.

Sources: AAHA Canine Vaccination Guidelines; AAHA Core and Noncore Vaccines for Dogs (2022 table); AAHA leptospirosis update; WSAVA 2024 Guidelines for the Vaccination of Dogs and Cats; CDC Public Health Law Program rabies laws dataset (LawAtlas).