John Charles "Jack" Caldwell AO (born 8 December 1928) is a leading demographer, particularly in the fields of fertility transition and health transition.

Government outlines key elements of public health transition plans 3.

As India experiences a rapid health transition, it is confronted both by an unfinished agenda of eliminating infectious diseases, nutritional deficiencies, unsafe pregnancies and the challenge of escalating epidemics of non-communicable diseases.

Steady progress to a "health transition" in which such noninfectious diseases as heart disease and cancer would replace infectious diseases as the overarching global health challenge.

John Landers, ed., Historical epidemiology and the health transition (Canberra: Health Transition Centre, National Centre for Epidemiology and Population Health, Australian National University, 1993)