The question of the use of vaccines, in general, is often at the center of controversy in the forum of public opinion. In recent months, this Congregation has received several requests for guidance regarding the use of vaccines against the SARS-CoV-2 virus that causes Covid-19, which, in the course of research and production, employed cell lines drawn from tissue obtained from two abortions that occurred in the last century. At the same time, diverse and sometimes conflicting pronouncements in the mass media by bishops, Catholic associations, and experts have raised questions about the morality of the use of these vaccines.
