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In primitive times, people believed that illness and disease was caused by supernatural beings as punishment for disobedience. During these times priests and medicine men would treat illness. Many herbs were used during this time such as opium, which is still used today to relieve pain.

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During this time physicians were priests who would treat the sick. Imhotep was believed to be the first ever recorded physician. Medical treatment during this time included the use of leeches. Physicians were also forbidden upon experimentation.

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The Ancient Chinese used different therapies to treat illness such as acupuncture, which is still used today. They also over 1,000 medical herbs which were also used to treat illness. Some of these are still used today.

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Hippocrates, a Greek physician, discovered that disease was a result of natural causes. The Greeks were also the first to examine the body and how disease effects it; this helped to lead into modern medical sciences.

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Although the Ancient Romans were held back on medical advancement due to false teachings in human anatomy, they were the first to establish hospitals, and realized that disease was caused by overcrowding and filth, so they created sewers and aqueducts.

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The Muslim Arab Empire went through a medical revolution during this period. Rhazes, also known as the Arab HIppocrates, discovered that blood was the cause of infectious diseases and invented the first form of stitches. In Europe, the first true medical school was founded.

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The people of the Renaissance era began to form new ideas about science away from religion. Human corpses were dissected which lead to a closer understanding to human anatomy. The printing press was invented which lead to easier recording and sharing of medical information.

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The invention of the microscope by lead to the discovery of cells and allowed scientists to see the microorganisms that caused disease, this lead to the first vaccine created, for smallpox. Apothecaries were also established which would lead to the later development of pharmacies.

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The industrial revolution started and there were many new advances to medical science and healthcare such as the discovery of viruses, microorganisms were infected with disease. Women also were able to participate in healthcare and formal training for nurses began.

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Healthcare advanced rapidly and is still advancing to the day. A few notable ones include the development of new vaccines and medications such as insulin, organ transplants and the first cloning of a human embryo. Some discoveries include the discovery of ABO blood groups, and the discovery of how white blood cells fight disease.