Contents of this seminar include: Perspectives on vaccines in feline practice (Cynthia L. Bowlin); Hitting the bull's eye: Targeting connections between vaccines and cancer in cats (Philip H. Kass); Theory and practice of immunization (Ronald D. Schultz); Duration of immunity for feline biologics (Fred W. Scott); Feline infectious diseases (Fred W. Scott); Overview of feline biologics (Fred W. Scott); Licensing of feline biologics (Ted Williams); Vaccine site associated sarcomas: The Vancouver experience ([no author given]).