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Fertility and mortality
The medical contribution
2 other sections not shown
agricultural revolution airborne diseases airborne infections assess associated attributed birth rate bubonic plague cause of death cent chapter conclusion considered contributed death rate decline of mortality decrease of deaths developing countries diphtheria doubt effect eighteenth and early eighteenth century England and Wales evidence example experience fall of mortality food supplies food-borne diseases growth of population hospital host hygiene immunization and therapy important increase in food infant mortality infanticide infections infectious diseases influences interpretation level of mortality mainly malaria malnutrition measles medical measures micro-organisms modern rise natural selection non-infective conditions number of deaths occurred organisms parasite particularly plague pneumonia poliomyelitis population growth Population Studies possible post-registration period pre-registration period probably rate and death reasons reduction of deaths reduction of mortality registration result rise of population scarlet fever smallpox substantial sulphonamides syphilis tion treatment trend of mortality tuberculosis twentieth century typhus vaccination virus whooping cough