Encevac TC4 is for the vaccination of healthy horses 6 months of age or older against eastern and western sleeping sickness, tetanus and influenza due to strains A1 and A2 viruses. Foals nursing immune-dams should be vaccinated when maternal antibody levels will allow active immunization. All vaccines are shipped Express 1-2 Days. A $29.95 flat rate fee is charged for all orders containing vaccines. Someone should be present to sign for and receive the vaccine order when it ships to you. For more shipping info click here. NOTE: This item cannot be shipped to Minnesota, Canada and P.O. Boxes. Use must be approved by your veterinarian.