The feline distemper vaccine is designed to protect cats from a serious viral infection known as feline panleukopenia. This disease can cause severe gastrointestinal issues, immune system suppression, and can be fatal, especially in young kittens. The vaccine helps the cat's immune system recognize and fight the virus if exposed. Vaccination is typically recommended for all kittens and adult cats, especially those in high-risk environments, such as shelters or multi-cat households. The vaccine is usually administered in a series of shots, starting at around six to eight weeks of age, with boosters given as needed to maintain immunity.