1859 W. Moore (title) On infantile mortality, and the establishment of hospitals for sick children.
1901 14 Nov. 5/5 In England the term ‘infantile’ mortality applies only to the deaths of children under one year of age.
1911 G. B. Shaw Getting Married Pref. in 135 The high birth-rate of the very poor is counterbalanced by a huge infantile-mortality in the slums.