Health Glossary

Demystifying medical language. Browse or search for clear, human-centered explanations of common medical terms.

Vaccine

A vaccine is a biological preparation that trains the immune system to recognize and protect against specific infectious diseases without…
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Vein

A vein is a blood vessel that carries blood toward the heart. Most veins carry oxygen-poor blood, but the pulmonary…
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Virus

An infectious biological entity that contains genetic material and can reproduce only by using the machinery of a suitable host…
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Vitamin Deficiency

An organic micronutrient required in small amounts for normal growth, metabolism, maintenance, and physiological function. Humans need several vitamins, including…
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