Leucofeligen FeLV/RCP (feline calicivirosis, feline viral rhinotrachieitis, feline infectious enteritis (feline panleucopenia) vaccine (live), feline leukaemia vaccine (inactivated)) is used to protect cats from feline calicivirus, feline viral rhinotracheitis, feline panleukopenia, and feline leukemia. It's a multi-disease vaccine that provides broad protection for cats against some of the most common and serious feline infectious diseases.