Aluminum adjuvants in vaccines can initiate and promote feline cancers.
Feline vaccine-associated sarcomagenesis: is there an inflammation-independent role for aluminium?
AbdelMageed MA, Foltopoulou P, McNeil EA. Feline vaccine-associated sarcomagenesis: is there an inflammation-independent role for aluminium? Veterinary and Comparative Oncology. 2018;16(1):E130-E143.
This study, which examined whether aluminum adjuvants in vaccines can cause tumors in cats, found that the aluminum hydroxide adjuvant causes DNA damage and mutation. The study followed up on the observation that up to 10 of every 10,000 vaccinated cats develop an aggressive and invasive feline cancer at the site of vaccine administration within one to three years post-vaccination. The study confirmed that aluminum is highly persistent, continues to damage cells “for significant periods of time after initial exposure” and may “directly facilitate carcinogenesis” through the initiation and promotion of tumors.