What causes diseases and illnesses? How did the doctors diagnose and observe patients when there were no thermometers and stethoscopes? What is a CT scan and who developed it? This encyclopedia will answer these and more Hows and Whats for you. Learning is made simpler with well-labelled diagrams and an extensive glossary of difficult words. Bonus: the book comes loaded with isn't it amazing section of fun facts to keep you glued for more.

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