What Is a Clinical Trial? Phases and How They Work
A clear guide to clinical trials: what they are, the four phases, who can take part, how randomization and blinding work, and how participants are protected.
Informed consent is the requirement that a person understands what taking part in research involves, what is uncertain about it, and that they may decline or withdraw at any point without affecting their ordinary care. It is a continuing process rather than a signature, and it is one of the safeguards that exists because the history of medical research includes studies that should never have been run.
We cover how consent works in practice and where it is hardest: emergency research, participants who cannot consent for themselves, and studies run across very different regulatory and linguistic settings.
A clear guide to clinical trials: what they are, the four phases, who can take part, how randomization and blinding work, and how participants are protected.
Clinical research explained: what it is, the main study types, how trials are regulated and reviewed, and how evidence reaches clinical practice.