CAN VACCINES CAUSE CANCER?
The fibrosarcoma is an especially aggressive form of cancer that can affect cats spontaneously or by viral induction via the feline sarcoma virus. Recently, fibrosarcomas have been removed from areas of the body typically used for vaccination and, to the surprise of the veterinary profession, particles of aluminum based vaccine ingredients (called “adjuvants”) were discovered within the tumor. The working theory is that vaccination may induce this form of cancer in rare cases (between 1 in 1000 & 1 in 10,000 cats). The killed feline leukemia vaccine and the killed rabies vaccine have been implicated as being more likely to be involved. The problem is definitely not a matter of simply changing to non-aluminum based adjuvants but is more complicated. A list of preventive measures has been issued by most veterinary associations. Click here for more information on this problem.
