Relative female to male fever mortality by age group for all Punjab districts (1908 to 1917). Excess female fever mortality increase in the 5-9 age group, and remains high during the female reproductive age, only returning to levels comparable to males in the age groups over 40 years. Standard deviations are highest for the 20-29 year age group. Apart from malaria, excess female fever mortality will be associated with perinatal bacterial infections. The slope in the decline of excess mortality between the 10 to 14 and the 30 to 39 year age group could signify a specific pregnancy-associated immunity.