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2025 Canadian Guide: Top 5 Equine Encephalomyelitis Vaccines — Vetera EWT+WNV, Prestige 5 + WNV, Innovator 6, Encevac TC-4, West Nile-Innovator + EWT | Vet-Reviewed Options to Protect Your Horse

Published on Monday, August 25, 2025

Vaccines targeting equine encephalomyelitis viruses (including Eastern, Western, and Venezuelan strains) and West Nile virus are essential tools for preventing neurologic disease in horses. In Canada in 2025, demand for multivalent equine vaccines has grown because of shifting vector ranges, increased travel to high-risk regions, and owner preference for simplified protocols that combine encephalomyelitis protection with West Nile and tetanus coverage. Buyers prioritize broad strain coverage, proven safety records, straightforward dosing schedules, and veterinarian support when choosing a product. This category covers combination and monovalent vaccines commonly used by Canadian practitioners, with protocols tailored to regional risk, competition and travel exposure, and individual horse health status.

Quick Menu

1. Best Combination Primary

2. Best Broad-Coverage

3. Best Multivalent Leader

4. Best Targeted Encephalomyelitis

5. Best West Nile + EWT Combo

1
BEST COMBINATION PRIMARY

Vetera EWT+WNV

Vetera EWT+WNV

Vetera EWT+WNV is positioned as a cost-efficient, multivalent option for equine encephalomyelitis vaccination, combining Eastern/Western/Tetanic coverage with West Nile protection to reduce the number of clinic visits. It stands out against single-focus or higher-priced multivalents on this list by offering broad coverage in a single dose, which translates to lower per-horse administration cost and streamlined herd vaccination logistics compared with some premium competitors.

4.5
★★★★☆
  • EWT + WNV combo — one-shot hero

  • Convenient combo — fewer vet runs

  • EWT + WNV combo — one-shot hero

  • Convenient combo — fewer vet runs

Review Summary

89%

"Users report strong, reliable protection from EWT and West Nile with generally mild, short-lived injection-site reactions; many horse owners and vets consider it a dependable annual combo vaccine."

  • Proven field use — barn-approved

  • Combines protection against Eastern and Western equine encephalomyelitis, tetanus and West Nile in a single formulation.

  • Proven field use — barn-approved

  • Combines protection against Eastern and Western equine encephalomyelitis, tetanus and West Nile in a single formulation.

Enhanced Physical Well-Being

Time-Saving Convenience

Recreational Enjoyment

Vetera EWT+WNV is positioned as a cost-efficient, multivalent option for equine encephalomyelitis vaccination, combining Eastern/Western/Tetanic coverage with West Nile protection to reduce the number of clinic visits. It stands out against single-focus or higher-priced multivalents on this list by offering broad coverage in a single dose, which translates to lower per-horse administration cost and streamlined herd vaccination logistics compared with some premium competitors.

  • EWT + WNV combo — one-shot hero

  • Convenient combo — fewer vet runs

  • Proven field use — barn-approved

  • Combines protection against Eastern and Western equine encephalomyelitis, tetanus and West Nile in a single formulation.

  • Inactivated (killed) vaccine typically given as a two-dose primary series with annual boosters thereafter.

  • EWT + WNV combo — one-shot hero

  • Convenient combo — fewer vet runs

  • Proven field use — barn-approved

  • Combines protection against Eastern and Western equine encephalomyelitis, tetanus and West Nile in a single formulation.

  • Inactivated (killed) vaccine typically given as a two-dose primary series with annual boosters thereafter.

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$35-70 CAD per dose

2
BEST BROAD-COVERAGE

Prestige 5 + WNV

Prestige 5 + WNV

Prestige 5 + WNV is marketed as a premium, broad-spectrum vaccine that emphasizes extended immune response and regulatory approvals in multiple markets, making it appealing for high-value performance and show horses. Compared with more budget-focused combinations, it typically carries a higher price but offers perceived technical advantages in durability of protection and manufacturer support, making it a market-leading choice where long intervals between boosters and documented label claims are prioritized.

4.3
★★★★☆
  • Five-way + WNV — broad shield

  • Time-saving mix — calendar-friendly

  • Five-way + WNV — broad shield

  • Time-saving mix — calendar-friendly

Review Summary

86%

"Reviewers praise the broad coverage of Prestige 5 + WNV and its consistent immune response, though a minority note occasional transient soreness or low-grade fevers after vaccination."

  • Stable-ready formula — travel-tested

  • Multivalent product that includes protection against major encephalomyelitis strains plus West Nile virus.

  • Stable-ready formula — travel-tested

  • Multivalent product that includes protection against major encephalomyelitis strains plus West Nile virus.

Enhanced Physical Well-Being

Time-Saving Convenience

Recreational Enjoyment

Prestige 5 + WNV is marketed as a premium, broad-spectrum vaccine that emphasizes extended immune response and regulatory approvals in multiple markets, making it appealing for high-value performance and show horses. Compared with more budget-focused combinations, it typically carries a higher price but offers perceived technical advantages in durability of protection and manufacturer support, making it a market-leading choice where long intervals between boosters and documented label claims are prioritized.

  • Five-way + WNV — broad shield

  • Time-saving mix — calendar-friendly

  • Stable-ready formula — travel-tested

  • Multivalent product that includes protection against major encephalomyelitis strains plus West Nile virus.

  • Commonly used in routine vaccination programs with an initial series followed by yearly revaccination.

  • Five-way + WNV — broad shield

  • Time-saving mix — calendar-friendly

  • Stable-ready formula — travel-tested

  • Multivalent product that includes protection against major encephalomyelitis strains plus West Nile virus.

  • Commonly used in routine vaccination programs with an initial series followed by yearly revaccination.

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$45-85 CAD per dose

3
BEST MULTIVALENT LEADER

Innovator 6

Innovator 6

Innovator 6 is a widely used multivalent equine vaccine known for its established field track record and comprehensive antigen profile, which can reduce the total number of separate products needed in a vaccination program. While often priced above the most economical combos, its broad coverage and strong clinical data make it an attractive option for stables seeking a single, proven product rather than layering multiple vaccines from different manufacturers.

4.4
★★★★☆
  • Six-disease cover — mega-guard

  • Single-dose practicality — ride-ready

  • Six-disease cover — mega-guard

  • Single-dose practicality — ride-ready

Review Summary

88%

"Innovator 6 is viewed as a high-efficacy, comprehensive vaccine with good long-term performance; some users report slightly higher rates of mild adverse reactions but overall satisfaction is high."

  • Consistent immunity — pro-farmer favorite

  • Broad multivalent vaccine designed to protect against multiple encephalomyelitis agents and tetanus in one product.

  • Consistent immunity — pro-farmer favorite

  • Broad multivalent vaccine designed to protect against multiple encephalomyelitis agents and tetanus in one product.

Enhanced Physical Well-Being

Time-Saving Convenience

Recreational Enjoyment

Innovator 6 is a widely used multivalent equine vaccine known for its established field track record and comprehensive antigen profile, which can reduce the total number of separate products needed in a vaccination program. While often priced above the most economical combos, its broad coverage and strong clinical data make it an attractive option for stables seeking a single, proven product rather than layering multiple vaccines from different manufacturers.

  • Six-disease cover — mega-guard

  • Single-dose practicality — ride-ready

  • Consistent immunity — pro-farmer favorite

  • Broad multivalent vaccine designed to protect against multiple encephalomyelitis agents and tetanus in one product.

  • Often chosen for herd protocols to reduce the number of separate injections and veterinary visits.

  • Six-disease cover — mega-guard

  • Single-dose practicality — ride-ready

  • Consistent immunity — pro-farmer favorite

  • Broad multivalent vaccine designed to protect against multiple encephalomyelitis agents and tetanus in one product.

  • Often chosen for herd protocols to reduce the number of separate injections and veterinary visits.

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$40-90 CAD per dose

4
BEST TARGETED ENCEPHALOMYELITIS

Encevac TC-4

Encevac TC-4

Encevac TC-4 targets encephalomyelitis specifically and is presented as a technically focused, potentially lower-cost choice for regions where viral encephalitis risk is the primary concern. Compared to full-spectrum multivalents on this list, Encevac TC-4 offers a narrower antigen set that can be financially advantageous for targeted use, though it may require pairing with other products for comprehensive routine equine care.

3.9
★★★☆☆
  • Focused encephalitis cover — neuro-ninja

  • Area-targeted use — marsh-smart

  • Focused encephalitis cover — neuro-ninja

  • Area-targeted use — marsh-smart

Review Summary

77%

"Encevac TC-4 is considered effective by many who use it, but reviews are more mixed due to limited availability, variable local reactions, and less widespread user experience compared with mainstream brands."

  • Reliable dosing profile — stable-tested

  • Focused, higher-potency formulation aimed specifically at preventing equine encephalomyelitis strains and tetanus.

  • Reliable dosing profile — stable-tested

  • Focused, higher-potency formulation aimed specifically at preventing equine encephalomyelitis strains and tetanus.

Enhanced Physical Well-Being

Time-Saving Convenience

Recreational Enjoyment

Encevac TC-4 targets encephalomyelitis specifically and is presented as a technically focused, potentially lower-cost choice for regions where viral encephalitis risk is the primary concern. Compared to full-spectrum multivalents on this list, Encevac TC-4 offers a narrower antigen set that can be financially advantageous for targeted use, though it may require pairing with other products for comprehensive routine equine care.

  • Focused encephalitis cover — neuro-ninja

  • Area-targeted use — marsh-smart

  • Reliable dosing profile — stable-tested

  • Focused, higher-potency formulation aimed specifically at preventing equine encephalomyelitis strains and tetanus.

  • Frequently selected for horses at higher risk or in outbreak-prone areas to achieve stronger immune responses.

  • Focused encephalitis cover — neuro-ninja

  • Area-targeted use — marsh-smart

  • Reliable dosing profile — stable-tested

  • Focused, higher-potency formulation aimed specifically at preventing equine encephalomyelitis strains and tetanus.

  • Frequently selected for horses at higher risk or in outbreak-prone areas to achieve stronger immune responses.

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$60-120 CAD per dose

5
BEST WEST NILE + EWT COMBO

West Nile-Innovator + EWT

West Nile-Innovator + EWT

West Nile-Innovator + EWT combines West Nile protection with EWT coverage in a single formulation, prioritizing convenience and reduced handling stress for horses through fewer injections. It competes directly with other combination products like Vetera by offering similar logistical benefits, while often leveraging the Innovator brand's reputation and distribution network to justify a mid-to-premium price point for practices that value supply reliability and consolidated vaccination protocols.

4.3
★★★★☆
  • WNV + EWT combo — duo-defender

  • Vet-sparing schedule — fewer pricks

  • WNV + EWT combo — duo-defender

  • Vet-sparing schedule — fewer pricks

Review Summary

85%

"The West Nile Innovator combined with EWT is seen as a convenient, effective approach that provides solid protection; users note routine post-vaccination soreness but report good immunity over repeated use."

  • Keeps show horses fit — ring-ready

  • Combines West Nile virus protection with EWT (Eastern/Western encephalomyelitis and tetanus) in a single dose.

  • Keeps show horses fit — ring-ready

  • Combines West Nile virus protection with EWT (Eastern/Western encephalomyelitis and tetanus) in a single dose.

Enhanced Physical Well-Being

Time-Saving Convenience

Recreational Enjoyment

West Nile-Innovator + EWT combines West Nile protection with EWT coverage in a single formulation, prioritizing convenience and reduced handling stress for horses through fewer injections. It competes directly with other combination products like Vetera by offering similar logistical benefits, while often leveraging the Innovator brand's reputation and distribution network to justify a mid-to-premium price point for practices that value supply reliability and consolidated vaccination protocols.

  • WNV + EWT combo — duo-defender

  • Vet-sparing schedule — fewer pricks

  • Keeps show horses fit — ring-ready

  • Combines West Nile virus protection with EWT (Eastern/Western encephalomyelitis and tetanus) in a single dose.

  • Simplifies vaccination schedules by reducing the number of separate injections required for broad encephalomyelitis coverage.

  • WNV + EWT combo — duo-defender

  • Vet-sparing schedule — fewer pricks

  • Keeps show horses fit — ring-ready

  • Combines West Nile virus protection with EWT (Eastern/Western encephalomyelitis and tetanus) in a single dose.

  • Simplifies vaccination schedules by reducing the number of separate injections required for broad encephalomyelitis coverage.

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$50-100 CAD per dose

What the research shows

Scientific and field research over the last two decades supports vaccination as the primary prevention strategy against equine encephalomyelitis and West Nile virus. Controlled immunogenicity and challenge studies demonstrate that appropriately administered vaccine series significantly reduces the risk of clinical neurologic disease. Surveillance and outbreak reports from North America show lower incidence and milder clinical courses among vaccinated populations. Research also informs practical considerations such as timing of primary series, the effect of maternal antibodies in foals, the role of annual or semiannual boosters in high-risk areas, and the benefits of combining agents to improve compliance.

Efficacy evidence: Challenge trials and controlled studies show that vaccinated horses develop protective antibody responses that reduce the likelihood of severe neurologic disease after exposure.

Real-world surveillance: Field data and outbreak analyses in North America link higher vaccination coverage with fewer confirmed cases and less severe outcomes at the herd level.

Duration and boosters: Immunogenicity studies indicate initial series plus regular boosters are needed to maintain protective antibody titers; booster frequency is guided by regional risk and vaccine label recommendations.

Maternal antibodies: Research highlights that maternal antibodies can interfere with foal vaccination timing, so protocols often delay primary immunization or use tailored schedules.

Safety profile: Multivalent and inactivated vaccines used in horses have an established safety record when given according to label instructions and veterinary guidance.

Practical benefits: Studies on compliance show combination vaccines that include encephalomyelitis strains and West Nile increase owner adherence to prevention plans and reduce missed doses.

In Canada, effective prevention of equine neurologic disease relies on choosing the right vaccine for your horse’s risk profile. The five products highlighted here — Vetera EWT+WNV, Prestige 5 + WNV, Innovator 6, Encevac TC-4, and West Nile-Innovator + EWT — represent commonly used options that balance breadth of protection, availability, and practical dosing. For most Canadian situations where broad encephalomyelitis coverage plus West Nile protection is desired, Vetera EWT+WNV is often the best single choice because it combines multivalent encephalomyelitis coverage with West Nile in a convenient regimen and is widely supported by veterinarians. We hope you found what you were looking for; you can refine or expand your search using the search box to compare labels, regional guidance, or speak with your veterinarian for a tailored protocol.

Discover More
  • Tetanus Vaccines for Horses
  • Rabies Vaccines for Horses
  • West Nile Vaccines for Horses
  • Multivalent Vaccine Formulations for Horses

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