What Vaccines Do Rabbits Need and When to Give Them

Pet rabbits need vaccination against two deadly viral diseases: myxomatosis and rabbit hemorrhagic disease (RHD). In most countries where vaccines are available, rabbits should receive their first dose between five and ten weeks of age, with annual boosters to maintain protection. The specifics get complicated because rabbit hemorrhagic disease comes in two distinct viral forms, and not every vaccine covers both, which means the product your vet uses and the schedule they recommend will depend heavily on where you live.

The Diseases Behind the Vaccines

Myxomatosis and rabbit hemorrhagic disease are the two major viral threats to domestic rabbits, and both are almost always fatal once symptoms appear. Myxomatosis is caused by the myxoma virus and spreads primarily through biting insects like fleas and mosquitoes, though direct contact between rabbits can also transmit it. Infected rabbits develop swelling around the eyes, nose, and genitals, and most die within ten to fourteen days. There is no effective treatment once clinical signs develop, which makes vaccination the only realistic defense.

Rabbit hemorrhagic disease is caused by a calicivirus and tends to kill even more rapidly. Rabbits can die within 24 to 72 hours of infection, sometimes with no visible symptoms at all beforehand. The virus spreads through direct contact, contaminated surfaces, food, water, and even on the shoes or clothing of people who have been near infected animals. It is remarkably stable in the environment and can survive for months on surfaces at room temperature.

The situation with RHD became considerably more complicated around 2010 when a new variant, RHDV2, emerged in France and spread across Europe, Australia, and eventually North America. RHDV2 is genetically and antigenically distinct from the original virus (now called RHDV1 or “classical” RHD), and research has confirmed that rabbits vaccinated against RHDV1 can still be killed by RHDV2.¹ This means that vaccination against “RHD” in general is not enough; your rabbit needs protection against both variants, or at least against the one circulating in your area.

What Vaccines Are Available

The vaccine landscape for rabbits varies dramatically by country, which is one of the most frustrating aspects of rabbit ownership. In Europe and the UK, rabbit owners have access to the widest range of products, including a trivalent vaccine called Nobivac Myxo-RHD PLUS. This single-dose vaccine protects against all three threats: myxomatosis, RHDV1, and RHDV2. Studies supporting its registration confirmed that it is safe for rabbits from five weeks of age onward, including pregnant rabbits, and that a single subcutaneous injection provides protection from three weeks post-vaccination through twelve months.² The vaccine uses a live, attenuated myxoma virus as a vector carrying genes for both RHD variants, and is produced entirely in cell culture rather than in live rabbits, which is a meaningful animal welfare improvement over older production methods.

In the United States, the situation has been more difficult. Myxomatosis vaccines have generally not been licensed, partly because myxomatosis has historically been less prevalent in the US rabbit population. The more urgent concern has been RHDV2, which arrived in wild and domestic rabbit populations in the US around 2018 and spread rapidly through the Southwest and other regions. In response, a killed (inactivated) recombinant subunit vaccine targeting RHDV2 was developed using the VP60 protein of circulating US strains, adjuvanted with aluminum hydroxide.³ For several years before full USDA approval of domestic products, US veterinarians could only access imported European vaccines through emergency-use permits, which created supply bottlenecks and inconsistent availability.

In Australia, the picture is further complicated by the fact that RHDV is deliberately used as a biocontrol agent against wild rabbits, which are a devastating invasive species. The Cylap vaccine has been the standard product for protecting pet rabbits, and experimental testing confirmed it was effective against multiple strains under controlled conditions.⁴ However, once RHDV2 arrived in Australia, research showed that monovalent vaccines offered limited cross-protection against the new variant, leading to calls for multivalent vaccines that cover both classical RHD and RHDV2.⁵

When to Start and How Often to Boost

The age at which a kit (baby rabbit) should receive its first vaccination depends on the specific product, but a common window is between five and ten weeks. With the trivalent Nobivac Myxo-RHD PLUS, rabbits can be vaccinated from five weeks of age.² Some vets prefer to wait until closer to eight or ten weeks, particularly when using killed vaccines that may require a booster dose two to four weeks after the initial injection. There is no single universal schedule because different products have different onset times and durations of immunity.

The timing question is complicated by maternal antibodies. If the mother was vaccinated or had natural exposure to RHD, her kits will inherit temporary protection through her milk. Research tracking antibody levels in kits born to vaccinated does found that maternal antibodies against RHDV2 remained above protective thresholds until roughly four weeks of age, then declined, with no kits still testing positive by about eight weeks.⁶ Those maternal antibodies can interfere with vaccination if you vaccinate too early, because the kit’s immune system does not mount its own response while the mother’s antibodies are still circulating. Vaccinating too late, on the other hand, leaves a gap when the kit has no protection at all. The practical compromise most vets settle on is vaccinating between six and ten weeks, after maternal antibodies have waned enough to allow the kit’s own immune system to respond.

Annual boosters are standard across most products and regions. The trivalent vaccine provides protection for up to twelve months after a single dose, at which point a booster is needed. In higher-risk settings, such as areas with active RHD outbreaks or heavy insect populations (which drive myxomatosis transmission), some vets may recommend boosting every six months. Given the short overall lifespan of rabbits and the documented need for boosters, maintaining consistent vaccination programs is critical for sustained protection.⁷

Do Indoor Rabbits Really Need Vaccines?

This is one of the most common questions rabbit owners ask, and the answer is yes. The reasoning is straightforward: both myxomatosis and RHD can reach your rabbit without your rabbit ever going outside. Myxomatosis is spread by fleas and mosquitoes, which can get into any home. RHD virus is so environmentally stable that you can track it indoors on your shoes, bring it in on hay or fresh vegetables, or introduce it through contact with other animals. There have been documented cases of indoor-only rabbits dying from both diseases.

The perception that indoor rabbits are “safe” probably comes from thinking of these viruses like they spread the way a dog park illness does, through direct animal-to-animal contact. While direct contact is one route, the indirect routes are often more dangerous precisely because they are invisible. You cannot tell whether a bag of hay was stored in a warehouse where wild rabbits had access, or whether a fly that landed on your rabbit’s water dish carried viral particles.

The one reasonable caveat is geographic. If you live in an area with no documented cases of myxomatosis or RHD, and no vaccine is locally available without significant effort, the cost-benefit calculation shifts. But for most rabbit owners in Europe, the UK, Australia, and increasingly the US, vaccination of indoor rabbits is considered standard preventive care.

Side Effects and Safety

Rabbit vaccines have a strong safety profile overall. A study tracking adverse reactions across 933 vaccination events in pet rabbits found that reactions occurred in fewer than two percent of cases. The most common were local injection site reactions like hair loss, scabbing, or small abrasions at the site of the injection. Some rabbits showed systemic signs including gut slowdown (a concern in rabbits because their gastrointestinal systems are sensitive), lethargy, or temporary forelimb lameness. Older rabbits were less likely to have reactions than younger ones, and the reactions that did occur were generally mild and resolved on their own.⁸

Early experimental work on recombinant myxoma-RHD vaccines also showed reassuring safety data: one study found no undesirable effects even when the vaccine was administered at 100 times the normal dose, and pregnant and immunosuppressed rabbits tolerated it without problems.⁹ That said, any vaccine can occasionally trigger a reaction in a sensitive individual. If your rabbit seems unusually lethargic, stops eating, or develops any swelling beyond mild soreness at the injection site in the days following vaccination, a vet visit is warranted. Gut stasis in particular should be taken seriously in rabbits, since their digestive system depends on constant movement.

A practical tip: schedule the vaccination for a morning appointment if possible. That way you have the rest of the day to watch your rabbit for any reactions during the period when they are most likely to show up, which is the first six to twelve hours.

Why One Vaccine Might Not Be Enough

The emergence of RHDV2 created a genuine gap in vaccine protection that caught many rabbit owners off guard. Before RHDV2 appeared, a single RHD vaccine targeting the classical virus was considered adequate. Now, a rabbit vaccinated only against RHDV1 has no reliable protection against RHDV2, and in many regions RHDV2 has become the dominant circulating strain.¹

In countries where only monovalent vaccines are available, some vets recommend giving separate vaccines for RHDV1 and RHDV2, spaced two weeks apart. In places where the trivalent vaccine is available, the problem is solved in a single injection. For US rabbit owners who may only have access to an RHDV2-specific vaccine, the practical reality is that RHDV2 is the more urgent threat, since classical RHDV has been less commonly detected in North American outbreaks. Still, this is a conversation to have with your vet based on what is circulating locally.

Research in Australia has been especially clear on the limits of cross-protection: rabbits given a vaccine against one RHD variant showed limited immune defense against different variants, reinforcing the case for multivalent products that cover multiple strains.⁵ If you are unsure which vaccines your rabbit has received and which strains they cover, ask your vet for the product name and check whether it includes RHDV2 protection specifically.

Vaccine Access Varies Wildly by Region

If you read rabbit care forums, you will quickly notice that owners in different countries seem to be living in different realities when it comes to vaccination. That is because they are. In the UK, rabbit vaccination is routine and widely available; most vets stock the trivalent product and include it in standard wellness visits. In much of continental Europe, the situation is similar. Australian rabbit owners have had longstanding access to calicivirus vaccines, though the arrival of RHDV2 created some disruption until newer products became available.

The US has been the most challenging environment for rabbit vaccination. For years, the only way to access RHD vaccines was through USDA emergency-use authorizations, which required vets to apply for individual permits, and the imported vaccines were not always consistently available. A domestically produced recombinant subunit vaccine targeting RHDV2 has been developed and studied, with research even addressing whether the vaccine could be safely used from multidose vials over extended periods to improve practicality for veterinary clinics serving many rabbits.¹⁰ The regulatory landscape in the US is still evolving, and availability can vary by state. If you are having trouble finding a vet who carries rabbit vaccines, rabbit rescue organizations and the House Rabbit Society often maintain referral lists.

For owners who travel with their rabbits internationally, or who adopt rabbits from abroad, the vaccination history matters. A rabbit vaccinated in France with a European product and then moved to the US may need additional vaccinations to meet local vet recommendations, or the reverse. Always bring vaccination records with you and make sure the product names are clearly documented.

Cost and Barriers to Vaccination

Rabbit vaccination costs vary widely, but a typical visit including the exam and a single vaccine runs between $50 and $100 in many markets. In the UK, where rabbit vaccination is standard, some clinics offer bundled packages. In the US, costs can be higher because exotic animal vet visits tend to carry a premium, and vaccine supply constraints have sometimes driven up prices.

Financial barriers are real and have been worsened by broader economic pressures. Research into preventive healthcare for pet rabbits found that the COVID-19 pandemic disrupted access to veterinary services, and the cost-of-living crisis further increased the financial burden of pet ownership.¹¹ Rabbits are sometimes perceived as “low-cost” pets, which can lead to underinvestment in their veterinary care. The reality is that a rabbit living eight to twelve years will need annual vaccinations across its lifetime, along with other routine care.

If cost is a concern, it is worth checking with local rabbit rescue groups, many of which organize low-cost vaccination clinics. Some veterinary schools with exotic animal programs also offer reduced-rate services. Skipping vaccination altogether is risky, but if you have to prioritize, your vet can help you decide which vaccine is most critical based on local disease activity.

Vaccinating Wild and Endangered Rabbit Populations

Vaccination is not just a pet owner concern. Conservation biologists have turned to vaccines to protect endangered rabbit species from RHDV2 outbreaks that can devastate small, fragile populations. A vaccine safety trial conducted on wild riparian brush rabbits, an endangered species, found that all 19 vaccinated animals developed an antibody response, with seroconversion occurring at seven to ten days and antibody response lasting at least 60 days in nearly all individuals tested.¹² Some vaccinated rabbits were released into the wild and recaptured months later, offering early evidence that the immune response may persist in free-living animals.

Modeling work has suggested that vaccination programs for small, endangered populations can be effective at reducing disease-driven mortality, but the short lifespan of rabbits means that programs must maintain high vaccination coverage over time to keep population immunity from fading.⁷ This is a fundamentally different challenge from vaccinating a pet rabbit once a year: it requires sustained funding, repeated field campaigns, and the logistical ability to capture and vaccinate wild animals. For pet owners, the existence of this research is mainly reassuring: if vaccines work well enough to protect wild rabbits in unpredictable field conditions, they should work reliably for your rabbit in a controlled home environment.

A Quick Reference for What Your Rabbit Likely Needs

Because the variety of products and schedules can be overwhelming, here is a summary organized by region:

UK and EU: Trivalent vaccine (Nobivac Myxo-RHD PLUS or equivalent) covering myxomatosis, RHDV1, and RHDV2. First dose at five weeks of age or older. Annual boosters. Some vets may recommend a separate booster for myxomatosis at six months in high-risk areas.
United States: RHDV2 vaccine (recombinant subunit or imported product, depending on availability). First dose typically around eight to ten weeks, with a booster two to four weeks later for killed vaccines. Annual boosters. Myxomatosis vaccination generally not available or recommended unless local risk is identified.
Australia: Calicivirus (RHD) vaccine, with increasing need for RHDV2-specific products as the new variant spreads. First dose from four to ten weeks depending on product. Annual or six-monthly boosters depending on local outbreak risk. Myxomatosis vaccines are generally not available for pet rabbits in Australia due to regulatory restrictions related to the use of myxoma virus for biocontrol.

These are general starting points. Your vet should tailor the schedule based on your rabbit’s age, health status, pregnancy, and local disease activity. If you are adopting an adult rabbit with unknown vaccination history, most vets will start the vaccine series from scratch rather than assume prior protection.