| A | B |
| 4000 BC-3000 BC | Illness and disease were a punishment from the Gods |
| 4000 BC-3000 BC | Tribal witch doctors treated illness with ceremonies |
| 4000 BC-3000 BC | Herbs and plants used as medical treatment |
| 4000 BC-3000 BC | Trepanation used to remove the evil spirits |
| 3000 BC - 300 BC | Ancient Egyptians |
| 4000 BC-3000 BC | Primitive Times |
| 3000 BC - 300 BC | Physicians were priests |
| 3000 BC - 300 BC | Bloodletting and leeches used as medical treatment |
| 1700 BC - AD 220 | Ancient Chinese |
| 1700 BC - AD 220 | Used acupuncture |
| 1200 BC - 200 BC | Ancient Greeks |
| 1200 BC - 200 BC | 1st to observe the human body and the effects of disease- led to modern medical sciences |
| 1200 BC - 200 BC | Believed illness was a result of natural causes |
| 1200 BC - 200 BC | Used therapies such as massage, art therapy, and herbal treatment |
| 753 BC - AD 410 | Established 1st hospitals (caring for soldiers in their homes) |
| 753 BC - AD 410 | 1st Public Health and sanitation systems by building sewers and aqueducts |
| 400-800 AD | Dark Ages |
| 753 BC - AD 410 | Ancient Romans |
| 400-800 AD | Began after the fall of the Roman Empire |
| 400-800 AD | Emphasis on saving the soul |
| 400-800 AD | Study of medicine was prohibited |
| 400-800 AD | Monks and priests treated patients with prayer |
| 800 - 1400 AD | Middle Ages |
| 800 - 1400 AD | Renewed interest in medical practices of Greek and Romans |
| 800 - 1400 AD | Bubonic Plague killed 75% of population in Europe and Asia |
| 1350-1650 AD | Renaissance |
| 1350-1650 AD | Dissection of body led to increased understanding of anatomy and physiology |
| 1350-1650 AD | Invention of printing press allowed medical knowledge to be shared |
| 16th, 17th, and 18th Centuries | cause of disease still unknown and many people died of infections |
| 16th, 17th, and 18th Centuries | invention of microscope which allowed physicians ti see disease-causing organisms |
| 16th, 17th, and 18th Centuries | Apothecaries led to development of pharmacies |
| 16th, 17th, and 18th Centuries | 1st vaccine developed (smallpox) |
| 19th Century | formal training for nurses began |
| 19th Century | infection control developed once microorganisms were associated with disease |
| 19th Century | Viruses discovered in 1892 |
| 19th Century | Women became active participants in health care |
| 20th Century | Increased knowledge about the role of blood in the body |
| 20th Century | ABO blood groups discovered |
| 20th Century | discovered how white blood cells protect against disease |
| 20th Century | New medicines discovered |
| 20th Century | Insulin discovered for treatment of diabetes |
| 20th Century | Antibiotics discovered to fight infections |
| 20th Century | New machines developed |
| 20th Century | kidney dialysis machine |
| 20th Century | heart lung machine |
| 20th Century | Surgical and diagnostic techniques developed to cure once fatal conditions |
| 20th Century | organ transplants |
| 20th Century | test tube babies |
| 20th Century | implanted 1st artificial heart |
| 20th Century | Health care plans developed to help pay the cost of health care |
| Medicare and Medicaid | Government funded health care plans |
| HMO | alternative to private health insurance |
| Hospice | health care for people who have a terminal illness; goal is palliative and not curative |