This is a great breakdown of stats on life expectancy over time including child mortality: https://ourworldindata.org/life-expectancy https://ourworldindata.org

This is a great breakdown of stats on life expectancy over time including child mortality: https://ourworldindata.org/life-expectancy https://ourworldindata.org/life-expectancy Life expectancy has improved a lot in general, but less dramatically at old ages.