Feline panleukopenia virus (FPV) is a highly contagious virus that primarily affects domestic cats and some wild feline species. It attacks rapidly dividing cells, leading to severe gastrointestinal issues, immune system suppression, and can be fatal, especially in young or unvaccinated cats. Symptoms include vomiting, diarrhea, lethargy, and loss of appetite. Vaccination is the most effective way to prevent FPV, and most veterinarians recommend including it in routine feline vaccinations. The virus can survive in the environment for long periods, making it crucial for cat owners to maintain good hygiene and limit exposure to infected animals.