The US health secretary, Robert F. Kennedy Jr, believes that aluminium in vaccines can cause health issues, such as neurological disorders, allergies and autoimmune diseases. This contradicts scientific evidence from many studies that have confirmed the safety of vaccines and aluminium “adjuvants” – substances that boost vaccines’ effectiveness.
In November 2025, RFK Jr “personally ordered” the US Centers for Disease Control and Prevention (CDC) to alter its webpage on autism and vaccines, with several sections now casting doubt on vaccine safety. For example, where it previously stated that “studies have shown there is no link between receiving vaccines and developing autism spectrum disorder”, it now reads “‘vaccines do not cause autism’ is not an evidence-based claim”.
