Since 1992, an association between certain types of '''feline vaccines''' and the development of '''connective tissue tumours''' has been recognised. Current thought suggests that it is not only certain types of vaccines, but also '''any injection which produces localised inflammation''' which can lead to the development of sarcomas in '''genetically predisposed and susceptible cats'''. | Since 1992, an association between certain types of '''feline vaccines''' and the development of '''connective tissue tumours''' has been recognised. Current thought suggests that it is not only certain types of vaccines, but also '''any injection which produces localised inflammation''' which can lead to the development of sarcomas in '''genetically predisposed and susceptible cats'''. |