From The Hindu, June 26, 1925: Disease incidence in India

At the Congress of the Royal Sanitary Institute held at Brighton, London, Sir Leonard Rogers gave a paper on disease incidence and climate in India, which drew deductions from Indian data of great importance in connection with the serious increase in the percentage of unvaccinated children in Great Britain.

Sir Leonard Rogers said, as reported by “The Englishman” correspondent, that the well marked dry cold, dry hot and hot moist, rainy seasons in India, and the great variations in the rainfall in different areas, together with the carefully recorded vital statistics for several decades, furnished an ideal field for studying the influence of climatic conditions on disease incidence. He had shown in previous publications a very close relationship between high rainfall and high leprosy incidence, and vice versa, all over India, and also between humid monsoon winds and high orthosis rates which he illustrated by maps. He also demonstrated in a similar manner the closest relationship between low minimum temperatures, low humidity, and great diurnal variations of temperature during the cold season in the North.