Health
What Is a Clinical Trial?
A clinical trial is a carefully designed research study that tests whether a medical treatment is safe and works in people. Here are the phases and how they work.
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Health
Medicine, public health, wellbeing and the science of living longer and better. This section explains how health evidence is produced and weighed — what evidence-based medicine actually means in practice, how vaccines train the immune system, and why a widely used measure like BMI is more limited than its popularity suggests.
Tilias News does not publish medical advice, and nothing in this section substitutes for a clinician who knows your history. The aim is narrower and, we think, more useful: to help you read health coverage critically, recognise when a claim is stronger or weaker than it sounds, and ask better questions of the sources you rely on.
Health
What Is Herd Immunity?
Herd immunity is the indirect protection from an infectious disease that occurs when enough of a population is immune. Here is how the concept works.
Health
What Is a Placebo?
A placebo is an inactive treatment with no therapeutic effect of its own, used mainly in research. Here is what it is, the placebo effect, and why trials use it.
Health
What is a generic drug, and is it really the same medicine?
A generic has the same active ingredient as the brand and must prove it behaves the same way in the body. What differs is the packaging, the price and the…
Health
What “evidence-based medicine” actually means
The phrase gets used loosely. Its real meaning is narrower, more careful, and more useful than the marketing version suggests.
Health
How much sleep you really need, by the science
Most healthy adults need at least seven hours a night. The number shifts with age, and the quality of the evidence is better than you might think.
Health
BMI explained — and where it falls short
Body mass index is a simple, useful population screen — but it was never meant to diagnose any one person's health, and it can mislead.
