Thank you for your question. Fel-O-Vax Lv-K vaccine comes pre-mixed and there are 10 doses in 1 vial. You do not mix it with saline. You will need to purchase needles and syringes as the vaccine does not come with this.
This vaccine is for healthy cats 10 weeks of age or older. If a cat or kitten has never been vaccinated against feline leukemia before, the manufacturer recommends one dose now, then repeat in 3 to 4 weeks. Annual revaccination with a single dose is recommended.
The manufacturer recommends that this vaccine be boostered every year. This is not a 2 year vaccine.