Catechism of the Catholic Church §2292 — excerpt
Scientific, medical, or psychological experiments on human individuals or groups can contribute to healing the sick and the advancement of public health.
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.