In 1814, British Physician Charles Badham became the first to use the term “bronchitis” to denote “inflammatory changes in the mucous membrane.” This changed the way that doctors viewed a variety of medical conditions. Moving ahead to 1821, Dr. Rene Laennec, known as the father of chest medicine thanks in part to his invention of the stethoscope, accurately discovered the relationship between emphysema and chronic bronchitis. Laennec became the first to connect bronchitis to severe shortness of breath, and he was the first to define bronchitis as “lungs filled with mucus fluid