November 2007
There can be antigenic variation between field strains of Feline Calici Virus (FCV) and currently available vaccines do not induce sterilizing immunity.  Thus, although most vaccines induce reasonable cross protection against many FCV strains, FCV vaccinated cats may still develop clinical illness when exposed to some strains of the virus ..

September 2002

Fel-O-Vax® FIV is an inactivated, dual subtype (based on strains of Petaluma subtype A and Shizuoka subtype D) feline immunodeficiency virus (FIV) vaccine. The adjuvanted whole virus vaccine was released in July 2002, and is produced by Fort Dodge Animal Health. ..