In conclusion, for good protection of FeLV-infected cats, vaccination with core vaccines (against FPV, FHV, and FCV) should be performed regularly, even if the cat is kept strictly indoors (this is different to FIV-infected cats). If an owner cannot be convinced to keep a cat with progressive FeLV infection inside, rabies vaccinations can be given (in accordance with state and local regulations). Protection in a FeLV-infected cat after vaccination might not be as complete and long-lasting as in an uninfected cat. Thus, either more frequent vaccinations (e.g., annually), or measurement of anti-FPV-antibody titres to ensure sufficient protection against FPV is recommended for FeLV-infected cats.