Catechism of the Catholic Church §1018 — excerpt
As a consequence of original sin, man must suffer "bodily death, from which man would have been immune had he not sinned" (GS # 18).
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.