All images and text© Copyright of Jaffa’s Health Centre for Cats. Sed vulputate
Adjuvants and cancer
Vaccines may be made from live, ‘attenuated’ (weakened) virus, or dead (inactivated) virus. Dead virus does not trigger such a strong response, so to improve efficacy, irritant chemicals called ‘adjuvants’ are added.
These can be a trigger of malignant cancers called sarcomas, which can lead to death within months. Injection-site sarcomas are rare, occurring at a frequency of perhaps one in 70,000 doses of vaccine, so they are certainly not a reason to avoid vaccination.
We use non-adjuvanted vaccines.