Ultra Fel-O-Fax FELV is a 0.5 mL feline vaccine that provides proven feline leukemia (FeLV) protection resulting in a significantly less vaccine volume over the cat?s lifetime. Feline Leukemia Vaccine, Killed Virus, cats 10 weeks and older. Preservatives: Thimerosal, neomycin, polymyxin B and amphotericin B. All vaccines are shipped overnight. 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.