Quick Answer: Core vaccines every dog needs are: Distemper, Parvovirus, Adenovirus (combined in the DA2PP vaccine), and Rabies. These begin at 6–8 weeks and require a series for puppies, with boosters at 1 year and then every 1–3 years depending on vaccine type and local requirements. Non-core vaccines (Bordetella, Leptospirosis, Lyme) are recommended based on lifestyle and geographic risk.
Vaccination is one of the most important and cost-effective things you can do for your dog’s long-term health. The diseases core vaccines prevent — parvovirus, distemper, rabies — are serious, often fatal, and highly contagious. Prevention is dramatically less expensive than treatment, and with widely available vaccines, most of these diseases are entirely avoidable.
Core Vaccines — Every Dog Needs These
DA2PP (Distemper-Adenovirus-Parvovirus-Parainfluenza Combination)
This four-in-one vaccine is the foundation of every dog’s vaccination program. It protects against:
- Canine Distemper: A serious viral disease affecting the respiratory, gastrointestinal, and nervous systems. Often fatal; survivors may have permanent neurological damage. No cure — prevention is the only strategy.
- Adenovirus (Hepatitis): Causes infectious canine hepatitis, a potentially fatal liver disease.
- Parvovirus: Arguably the most important vaccine in a dog’s series. Parvo causes severe, often fatal gastrointestinal disease with a characteristic smell and bloody diarrhea. Extremely contagious — the virus survives in soil for years. Survival without intensive veterinary care is poor; even with treatment, mortality rates can reach 10–30%.
- Parainfluenza: Contributes to canine infectious respiratory disease complex (“kennel cough”).
Rabies
Required by law in nearly every US state. Fatal in both animals and humans once symptoms appear. A single bite from an infected animal is sufficient for transmission. The rabies vaccine is given once between 12–16 weeks (or later if the puppy series is started late), again at 1 year, and then either annually or every 3 years depending on the vaccine and local law.
Puppy Vaccination Schedule
Puppies require a series of vaccines — not because one is not enough, but because maternal antibodies (passed through colostrum) interfere with vaccine response. Until those maternal antibodies wane (usually around 12–16 weeks), a single vaccine may not produce full protection. The series ensures the vaccine takes at the right time:
| Age | Vaccine | Notes |
|---|---|---|
| 6–8 weeks | DA2PP (first dose) | Often given by breeder before puppy goes home |
| 10–12 weeks | DA2PP (second dose) | Bordetella, Leptospirosis, Lyme if indicated |
| 14–16 weeks | DA2PP (third dose) + Rabies | Final puppy series DA2PP; first rabies |
| 12–16 months | DA2PP booster + Rabies booster | 1-year boosters are critical; some vaccines don’t reach full duration without them |
Adult Vaccination Schedule
After the 1-year boosters, most adult dogs follow this schedule based on AAHA (American Animal Hospital Association) and AVMA guidelines:
- DA2PP: Every 3 years (after the 1-year booster), unless specific titer testing or local requirements suggest annual boosting
- Rabies: Every 1 or 3 years depending on the vaccine type used and your state’s legal requirements
- Non-core vaccines: Annually or semi-annually depending on type and exposure risk
Non-Core Vaccines — Based on Lifestyle and Location
Bordetella (Kennel Cough): Recommended for dogs that go to boarding, grooming, dog parks, or any environment with other dogs. Often required by boarding facilities. Available as intranasal, oral, or injectable. Typically given annually.
Leptospirosis: Recommended for dogs with outdoor exposure, especially to standing water, wooded areas, wildlife, or high-rodent environments. Lepto is zoonotic — it can be transmitted to humans. Two-dose initial series, then annual boosters. AAHA now recommends considering this vaccine for most dogs.
Lyme (Borrelia): Recommended for dogs in tick-endemic areas (Northeast, upper Midwest, Pacific Northwest). Two-dose initial series, then annually. Should be combined with tick prevention — the vaccine is not a substitute for year-round preventive.
Canine Influenza (CIV): Recommended for dogs with high social exposure. Two strains (H3N2 and H3N8) circulate in the US; a bivalent vaccine covers both. Two-dose initial series, then annual.
SJ
Susan J
Online Editor, Doggie General
Susan J has spent more than a decade writing about dog care, behavior, and training. A dog owner since childhood with hands-on experience across Labradors, mixed breeds, and rescue dogs, she draws on guidance from veterinary and behavioral organisations to make expert knowledge practical for everyday owners. Read more about Susan J →
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Written and reviewed by the Doggie General editorial team. This article is general information for dog owners, not veterinary advice. If your dog is unwell or you are worried about its health or behavior, contact your veterinarian. When you buy through links on this site we may earn a commission.