In Adam's fall we sinned all.
Death as the product of sin is not purely explicable in terms of individual personal sin. Personally committed sins and personal guilt is insufficient to explain the death of the innocent, the unborn nor the death and loss of the infant. Personal individual sin was not the cause of death reigning from Adam to Moses. In the pre law period of Adam to Moses God condemned humanity generically by flood in the days of Noah, by fire and flame in the days of Sodom and Gomorrah, by famine in the days of Joseph and in the death of the firstborn in the days of Pharoah and the Exodus. This reign of death was the consequence not only of imparted sin and death but also as the consequence of imputed guilt and condemnation. It is this imputation of guilt and condemnation by contamination or association with Adam that is the corollary to justification by faith in Jesus. If my relationship with Adam brings death, how much more would my relationship with Jesus bring me righteousness, life and imputed justification.
Romans chapter 5 verses 12 to 17
Dr J Stewart Gillespie