The Short Version
This claim is misleading. While it's true that rare allergic reactions to vaccine excipients (like gelatin or PEG) occur in roughly 1 per million doses, the unqualified statement implies vaccines are broadly dangerous. The overwhelming scientific consensus — including WHO, the CDC, the AAP, and a landmark study of 1.2 million children — confirms that vaccine ingredients like aluminum adjuvants and thimerosal are safe at the doses used, with no causal link to autism, neurological disorders, or systemic harm.