Core Vaccinations Your Puppy Needs (and When)

Core vaccines: recommended for every puppy

Core vaccines protect against diseases that are widespread, serious, and capable of affecting any dog regardless of lifestyle. That is why they are recommended essentially universally rather than tailored to individual circumstances.

In most of the world the core set is distemper, adenovirus, parvovirus and rabies — usually delivered as a combination injection plus rabies separately, per local law.

Why it takes several rounds

This is the part that confuses almost everyone, and it is worth understanding because it explains why you cannot simply vaccinate once and finish early.

Puppies absorb antibodies from their mother's first milk. Those maternal antibodies protect them for the first weeks of life — and, unhelpfully, they also neutralise vaccine given during that window. The level fades at a rate that differs from puppy to puppy and cannot be predicted without blood testing.

So the series repeats every two to four weeks through the window in which maternal antibodies might still be interfering. The final dose is the one that matters most, which is why it is given at or after around 16 weeks — by then maternal antibodies have reliably faded in essentially all puppies. Finishing the series early is the single most common reason a vaccinated-looking puppy still catches parvovirus.

The typical timeline

Most puppies start at six to eight weeks and finish at sixteen weeks or later. Your own vet may adjust this based on local disease prevalence, your puppy's history, and regional legal requirements for rabies — treat the table below as the shape of the schedule rather than as instructions.

Non-core vaccines: it depends where you live

These are recommended based on real exposure risk rather than universally, which is why the answer genuinely differs between two puppies on the same street with different lifestyles. This is a conversation to have with your own vet, who knows the local picture.

• Bordetella (kennel cough) — commonly required for boarding, daycare and grooming
• Leptospirosis — relevant where there is wildlife, livestock, or standing water; increasingly recommended broadly in some regions
• Canine influenza — relevant during outbreaks and in high-density dog populations
• Lyme disease — relevant in tick-heavy regions

Socialising safely before the series is done

This is the genuine tension in puppy-raising, and it deserves to be stated plainly: the behavioural socialisation window closes at around sixteen weeks, which is roughly when the vaccination series finishes. Waiting for full protection before a puppy meets anything means missing the window that determines how they handle the world for the rest of their life.

Veterinary behaviour bodies are clear that the answer is not to wait. It is to socialise in ways that carry low infectious risk — which is a large category once you stop thinking of socialisation as meaning 'the dog park'. Our first 48 hours guide covers why the first week is still too early even for this.

1. 1

   Carry them

   A puppy in your arms in a busy street sees traffic, buggies, hats, bikes and crowds without their feet touching contaminated ground.

2. 2

   Use private, known spaces

   Your own garden, a friend's home, and the homes of people whose adult dogs are fully vaccinated and known to be gentle.

3. 3

   Invite the world in

   Have visitors of different ages and appearances come to you — hats, beards, uniforms, walking sticks, children.

4. 4

   Ask about puppy classes

   Well-run classes require proof of the vaccines given so far and clean their floors between sessions. Veterinary behaviour groups generally support attending them before the series completes.

5. 5

   Avoid the high-risk ground

   Dog parks, pet shop floors, rest stops and anywhere with heavy unknown-dog traffic. Parvovirus persists in soil for months.

After the appointment

Mild reactions are common and expected: a quieter than usual evening, some soreness at the injection site, a slightly reduced appetite. These typically resolve within a day or so and are not a reason to skip future doses.

Serious reactions are rare but real, and they happen quickly. The distinction is worth knowing before you need it.