(Merck) Nobivac Lepto 4 is recommended as an aid in the prevention of disease, urinary shedding and mortality caused by lepto strains L. canicola, L. icterohaemorrhagiae, L. pomona, or L. grippotyphosa. For dogs 8 weeks of age or older. Give 1 ml SQ. Follow up with a 1 ml booster dose 2-4 weeks later. Annual revaccination with 1 dose is recommended. Not for pregnant bitches. Order syringes separately.