Pet Vaccinations Explained

Core vaccines protect against diseases that are widespread, highly transmissible, or carry a serious risk of severe illness or death, and are generally recommended for essentially all pets of that species regardless of lifestyle; in dogs this typically includes protection against diseases like parvovirus, distemper and canine hepatitis, and in cats against feline panleukopenia and common respiratory viruses, with rabies also considered core in many regions due to its public health significance.

Non-core vaccines protect against diseases where risk depends more on an individual pet's lifestyle, geography or exposure, such as kennel cough for a dog who boards or attends group classes regularly, or feline leukaemia virus for a cat with outdoor access. Your vet is best placed to assess which non-core vaccines make sense for a specific pet's actual lifestyle rather than giving every vaccine to every pet regardless of relevance.

Young animals usually receive a primary course of vaccinations given as a series of doses a few weeks apart, because maternal antibodies passed from the mother can interfere with a vaccine's effectiveness early on, and spacing doses out increases the chance that at least one dose is given once maternal antibody levels have dropped enough for the vaccine to generate the puppy's or kitten's own immune response.

After the primary course, booster vaccinations are typically given at intervals, sometimes annually and sometimes less frequently depending on the specific vaccine and local protocol, to maintain adequate protection over the pet's lifetime; skipping boosters because a pet 'seems healthy' undermines this maintained protection rather than being a safe shortcut.

Vaccination recommendations are shaped by local disease prevalence, so a vaccine considered core in one country may be non-core, or not routinely available, in another where that disease is rare or absent; rabies vaccination requirements, for instance, vary substantially between rabies-endemic and rabies-free regions and also interact with international pet travel rules.

Veterinary bodies in different regions periodically update guidance based on current disease surveillance data, which is why a protocol followed a decade ago, or one seen online referencing a different country, may not reflect current local best practice, and asking your own vet about locally relevant current guidance is more reliable than following generic or outdated information.

Vaccine reactions do occur but are generally mild and short-lived, such as temporary soreness at the injection site or mild lethargy for a day; serious adverse reactions are considerably less common, and veterinary bodies continue to monitor vaccine safety data to inform ongoing guidance. Weighing this low risk of reaction against the risk of a largely preventable, sometimes fatal disease is the basis of current vaccination recommendations rather than a one-sided calculation.

Titre testing, which measures existing antibody levels, is sometimes used as an alternative to automatic revaccination for certain core vaccines in adult pets, though it has limitations and does not apply to every vaccine or every situation; this is a decision to discuss directly with your vet rather than something to decide from general information alone.

A vet will typically tailor a vaccination plan to a pet's age, health status, local disease risk and lifestyle, meaning two otherwise similar pets can reasonably have somewhat different vaccination plans if, for example, one has regular boarding or outdoor access and the other does not. Bringing an accurate, honest picture of a pet's actual lifestyle, exercise and boarding habits, any outdoor access, travel plans, contact with other animals, to a vaccination consultation helps the vet make recommendations genuinely suited to that individual pet rather than a generic default.

Keeping vaccination records up to date and accessible matters practically too, since many boarding facilities, groomers, and countries for travel require proof of specific vaccinations before allowing access or entry.