True informed consent requires three things: full disclosure of risks, a clear understanding of benefits, and the freedom to choose without coercion.

However, the documents parents are asked to sign—and the clinical trials used to license vaccines—often rely on linguistic sleight-of-hand to obscure the truth. Terms like "placebo" and "safe" are redefined to mean something entirely different from what a reasonable person would expect.

This quiz places you in the shoes of a parent or trial participant. Can you spot the deception? Test your ability to decode the misleading language often found in vaccine clinical trial consent forms.