Regarding the use of vaccines developed using cells from aborted human persons By On 21 December 2020, Reuters reported on a document issued by the Congregation for the Doctrine of the Faith announcing that the Vatican had signed off on the use of vaccines even if their production employed cell lines drawn from tissues of aborted fetuses.[1] Though the CDF document stresses that it strongly desires the use of ethically acceptable vaccines, the document also emphasizes that the common good and the protection of the weakest and most exposed also hold equal claim. While CDF laments the lack of ethically acceptable vaccination methods, it argues incorrectly that the use of ethically compromised vaccines using fetal cell lines is remote material cooperation with evil, precisely because we are dealing in questions of life and death.