Medieval Medicine $c.1250-c.1500$

Ever wondered why doctors still take the Hippocratic Oath today? It all started with Hippocrates, a Greek physician born around 460 BC who promised doctors would do their best for patients and keep information confidential. He also developed the Theory of the Four Humours - blood, black bile, yellow bile, and phlegm - believing illness occurred when these were unbalanced.

Galen, a Roman doctor born in AD 129, built on this with his Theory of Opposites, treating illness by balancing humours with their opposites. As a surgeon, he explored human anatomy by dissecting pigs and monkeys instead of humans, discovering that the brain controls speech. However, his mistakes (like believing blood passed through tiny holes in the heart) were accepted by the Church because he referred to a creator.

Medieval society had different types of medical practitioners. Physicians trained for seven years at university studying ancient texts but were expensive and only diagnosed, not treated. Apothecaries passed knowledge through families and used natural remedies, while barber surgeons did bloodletting, tooth pulling, and basic surgery with minimal training.

Remember: Medieval medicine was based on ancient theories rather than scientific observation, which limited medical progress for centuries.

Renaissance Medicine $c.1500-c.1700$

The Renaissance changed everything - suddenly, questioning ancient authorities became acceptable! Andreas Vesalius revolutionised anatomy by actually dissecting human bodies (executed criminals, with a magistrate's permission). He discovered Galen's major errors: the human jaw is one bone, not two, and the breastbone has three parts, not seven.

William Harvey completely transformed understanding of blood circulation. Inspired by watching firefighters use pumps, he realised the heart pumps blood around the body in one direction through veins and arteries. His experiments (including cutting dogs' throats to observe blood flow) proved Galen's liver-based blood theory wrong.

Thomas Sydenham, nicknamed the 'English Hippocrates', encouraged doctors to abandon ancient texts and use direct observation instead. He believed diseases were the same in all patients and could be identified through careful symptom recording. This approach helped him distinguish between scarlet fever and measles, and discover that cinchona bark (containing quinine) treated malaria.

Scientific instruments also advanced medicine. Robert Hooke developed microscope use, opening up the invisible world of microorganisms that would later prove crucial for understanding disease.

Key Point: The Renaissance marked medicine's shift from blindly following ancient texts to conducting actual scientific observation and experimentation.

Industrial Medicine $c.1700-c.1900$

This era brought massive breakthroughs that actually started saving lives! Louis Pasteur developed Germ Theory - the revolutionary idea that microorganisms cause disease, not 'bad air' or unbalanced humours. He proved bacteria in the air made milk go off, arguing the same principle applied to human disease.

Edward Jenner pioneered vaccination after noticing milkmaids who caught cowpox never got smallpox. His risky experiment involved giving a healthy boy cowpox, then exposing him to smallpox - thankfully, the boy remained healthy! Meanwhile, James Simpson discovered chloroform as an effective anaesthetic, making surgery far less traumatic.

Disease prevention took a huge leap forward with John Snow's detective work during the 1854 cholera epidemic. By plotting deaths on a map, he proved most occurred near a specific water pump on Broad Street. Removing the pump handle stopped new cases, proving cholera was waterborne.

Joseph Lister developed carbolic acid as an antiseptic, dramatically reducing surgical infections. Florence Nightingale revolutionised nursing standards, emphasising cleanliness, ventilation, and proper observation. Robert Koch proved specific bacteria cause specific diseases by injecting healthy mice with anthrax bacteria.

Medical Revolution: This period established that germs cause disease and cleanliness prevents infection - foundations of modern medicine.

Modern Medicine $c.1900-Present$

Modern medicine has achieved what previous centuries could only dream of! Alexander Fleming's accidental discovery of penicillin in 1928 happened when mould contaminated his bacterial culture whilst he was on holiday. However, he never tested it on infected animals, so missed its life-saving potential.

Howard Florey and Ernest Chain at Oxford University recognised penicillin's importance in 1937. They developed mass production methods and tested it successfully on mice, then humans. During World War II, penicillin saved 15% of people with infected injuries, becoming the world's first antibiotic.

Paul Ehrlich developed 'magic bullets' - targeted treatments that attack specific diseases. His 606th attempt using arsenic successfully treated syphilis, showing that chemical compounds could target particular illnesses without harming healthy tissue.

The discovery of DNA's structure revolutionised medicine completely. Rosalind Franklin created crucial X-ray images (Photograph 51) of DNA, which James Watson and Francis Crick used to discover DNA's double helix structure in 1953. This breakthrough helps scientists understand genetic diseases like cystic fibrosis and Parkinson's disease, opening possibilities for gene therapy and personalised medicine.

Game Changer: Understanding DNA's structure has launched the era of genetic medicine, potentially allowing us to cure diseases at their source.