Which events occured before 1900 AD?
An english epidemiologist John Snow studied the epidemiology of cholera in London from 1848-1854 and established the role of polluted drinking water in spread of cholera. Ref : Park&;s textbook of preventive and social medicine; 23rd edition
Establishment of seat of social medicine at Oxford
Epidemiological work on cholera by John Snow
Work on scurvy by James Lind
Use of BCG vaccine
Concept of health and disease