The document discusses the history of medicine including diseases, medicines, vaccines, and nano-medicines. It describes how diseases can be congenital or acquired through bacteria like streptococcus or viruses. The early history of medicine relied on plants and natural remedies until the 19th century when chemistry allowed the development of modern medicines like penicillin. Vaccines were introduced in the 18th century starting with smallpox and have helped prevent deadly diseases throughout history. New developments include nano-medicines which use tiny particles to more effectively treat diseases like cancer with fewer side effects.