During and after World War I, many things changed and made progress, some of the major, big changes and advances after World War I were in the field of psychology and medicine. There have been many different advances in the field of medicine since World War I, some of the major medical advances have been in the field of surgery, in the development of new drugs, and in the field of mental health and psychology. Most of these medical advances were a result of and were an influence of World War I. Probably one of the most important medical advances was the discovery of penicillin in 1928 by a Scottish microbiologist named Alexander Fleming, who had actually discovered it by accident, when he noticed that a culture of bacteria had been growing, had stopped, he realized that it had been contaminated with a rare form of mold called penicillin and that it had killed the bacteria. Fleming thought that because it killed bacteria in the laboratory, it could also be used to kill bacteria in humans, but after unsuccessfully trying to grow more penicillin, he eventually gave up on the idea. Years later, other scientists also became intrigued by penicillin's possibilities and produced enough penicillin to demonstrate that it was a usable antibiotic. British scientists developed all of this during World War II and unfortunately due to the war no funding was available for their drug. They decided to bring their concepts to the United States, and once enough had been achieved, they were eventually used to treat wounded soldiers during World War I. One of the other notable advances was the "conquest of polio", this disease usually caused paralysis. in people who have contracted the virus. So there... in the middle of the paper... symptoms". The use of physiology did not exactly transform society, but it opened new doors to the study of human behavior. The study and use of theories based on psychology have proven useful for treating people with mental illnesses and medically unexplained problems. Interest in psychology led to the development of mental health institutions and mental health services, where people could get help for certain. mental problems. World wars, World War I and World War II have positively influenced many advances and changes in medicine. Without These new medical and physiological advances and studies help us understand what is happening in our own minds and in those of others they help people with mental problems and to cure and vaccinate various diseases. Thanks to the medical advances of the First and Second World Wars, it has helped our longevity, health and mental health.