This is an over the counter product - it does not require prescription.

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Fel-O-Vax LV-K (killed virus) is recommended for the vaccination of healthy cats 10 weeks of age or older to protect against diseases caused by feline leukemia virus. Directions: Inject 1 ml subcutaneously using aseptic technique. Repeat in 3 to 4 weeks. Annual revaccination with a single dose is recommended.

FAQ:

Q: What is the expiration for these vaccines?
A: For all vaccines, we only order them after our customer ordered to ensure that they have the farthest expiration date possible.