Baptism erases original sin but the inclination to sin remains. The absence of sanctifying grace in the new-born child is also an effect of the first sin, for Adam, having received holiness and justice from God, lost it not only for himself but also for us.
How does baptism affect original sin?
How does Baptism affect original sin? Original sin is the condition we inherit of tending to choose sin; Baptism offers the abundance of God's grace to overcome that tendency.
What sacrament can remove the original sin?
Confession also permits reconciliation with the Church, which is wounded by the sins people commit. Catholics believe that baptism removes original sin, the belief that all people are born tainted by sin. Therefore, baptism turns us back to God.