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Disease/Vaccine Foals and Weanlings Yearlings Performance
or Pleasure
Horses
Tetanus toxoid From non-vaccinated mare: 
First dose: 3-4 months 
Second dose: 4-5 months

From vaccinated mare: 
First dose: 6 months 
Second dose: 7 months 
Third dose: 8-9 months

Annual Annual
Equine
Encephalomyelitis,
Eastern, Western, 
Venezuelan 
(EEE,WEE,VEE)
EEE (in high-risk areas): 
First dose: 3-4 months 
Second dose: 4-5 months 
Third dose: 5-6 months
Annual, spring Annual, spring
WEE,EEE (in low-risk areas) and VEE: 
From non-vaccinated mare: 
First dose: 3-4 months 
Second dose: 4-5 months 
Third dose: 5-6 months

From vaccinated mare: 
First dose: 6 months 
Second dose: 7 months 
Third dose: 8 months.

Annual, spring Annual, spring
Influenza Inactivated injectable: 
From non-vaccinated mare: 
First dose: 6 months 
Second dose: 7 months 
Third dose: 8 months, 
then at 3-month intervals.

From vaccinated mare:
First dose: 9 months
Second dose: 10 months
Third dose: 11-12 months,
then at 3-month intervals.

Every 3-4 months Annual, with added boosters prior to likely exposure
Intranasal modified live virus: 
First dose: 11 months, or as your veterinarian recommends.
Every 6 months Every 6 months
Rhinopneumonitis
(EHV-1 and EHV-4)
First dose: 4-6 months 
Second dose: 5-7 months 
Third dose: 6-8 months, 
then at 3-month intervals.
Booster every 3 to 4 months up to annually Performance horses:Booster every 3-4 months up to annually. 
Pleasure horses:Optional: semi-annual if elected.
West Nile Virus First dose: 3-4 months 
Second dose: 1 month later
(plus 3rd dose at 6 months in areas at risk)
Annual booster, prior to expected risk. Vaccinate semi-annually or more frequently (every 4 months), depending on risk. Annual booster, prior to expected risk. Vaccinate semi-annually or more frequently (every 4 months), depending on risk.
Strangles Injectable: 
First dose: 4-6 months 
Second dose: 5-7 months 
Third dose: 7-8 months (depending on product used) 
Fourth dose: 12 months

Intranasal: 
First dose: 6-9 months 
Second dose: 3 weeks later

Semi-annual Optional: semi-annual if risk is high.
Potomac Horse Fever First dose: 5-6 months 
Second dose: 6-7 months
Semi-annual Semi-annual
Botulism (inactivated type B toxoid) From vaccinated mare: 
3-dose series of toxoid at 30-day intervals, starting at 2-3 months of age.

From non-vaccinated mare: 
Consult your veterinarian

Consult your veterinarian Consult your veterinarian
Equine Viral Arteritis Intact colts intended to be breeding stallions: one dose at 6-12 months of age. Annual for colts intended to be breeding stallions Annual for colts intended to be breeding stallions
Rotavirus A Little value to vaccination of foals because there is insufficient time to develop antibodies for protection during susceptible age. Not applicable Not applicable
Rabies Consult your veterinarian Consult your veterinarian Consult your veterinarian

Vaccination chart obtained here.