Tests (examinations) are diagnostic or monitoring tools that measure the presence of a substance, a biological condition, or a biomarker in a sample — such as urine, blood, saliva, hair, or tissue. We use them in many fields: medicine, employment and hiring, public safety, sports, scientific research, and even daily life (for example, a home pregnancy test). The main purpose is one: to turn doubt or possibility into a measurable result that helps us make evidence-based decisions.

Tests are not just medical examinations; they are a way to understand our bodies, reassure ourselves, and make conscious decisions for a healthier and safer future