The FVRCP vaccine is a crucial immunization for cats, protecting them from three highly contagious and life-threatening feline diseases: Feline Viral Rhinotracheitis (FVR), Feline Calicivirus (FCV), and Feline Panleukopenia (FP) . These diseases can be severe and even fatal, making the FVRCP vaccine an essential part of a cats core vaccine protocols. The vaccine is typically administered to kittens starting at around 6-8 weeks old, with booster shots given every three to four weeks until they are about 16-20 weeks old. After that, a kitten will need another booster when they are just over a year old, followed by boosters every three years throughout their lifetime. The FVRCP vaccine is considered a core vaccine for cats, meaning it is strongly recommended for all cats, regardless of whether they are indoor or outdoor cats. Adverse reactions to the FVRCP vaccine are unusual in cats, and when they do occur, they tend to be very mild, with most cats experiencing only slight fever and feeling "off" for a day or two.