All current anti-Covid-19 vaccines may be received by the faithful without moral compromise. While many appropriately cite a repugnance at the use of vaccines procured through the cell lines that originate in an aborted fetus ... the Church’s ancient moral distinction between formal and material cooperation in evil (originating with St. Alphonsus Ligouri and woven deeply into the theology of the Catechism, Pope St. John Paul II, Pope Benedict, and Pope Francis). While I understand that the average member of the laity may not appreciate that distinction I do believe so fundamental a teaching should be grasped readily by our clergy.
While vaccinations in general are a matter of individual decision, in particular instances the moral good of the community is so compelling that it takes precedence over our personal preferences—such as in a pandemic. None of us enjoys the moral freedom to dismiss the common good, as is so common in Western culture. Thus, there may well be a legitimate and compelling moral obligation for one to accept a vaccination, especially if one is in a role that is critical for the wellbeing of others.“Those who, however, for reasons of conscience, refuse vaccines produced with cell lines from aborted fetuses, must do their utmost to avoid, by other prophylactic means and appropriate behavior, becoming vehicles for the transmission of the infectious agent. In particular, they must avoid any risk to the health of those who cannot be vaccinated for medical or other reasons, and who are the most vulnerable.” [in summary: we have a clear moral obligation to abide by mask mandates and social distancing.]
For these reasons I am directing our clergy not to cooperate with any individuals seeking our endorsement of an exemption from vaccine or facemask mandates based specifically upon our Catholic faith. "I strongly encourage all parish volunteers to be vaccinated and to wear masks while serving at Mass. If for personal conscience reasons you choose not to be vaccinated then I urge you to withdraw from volunteering until our communities pass through this latest surge. Care for Christ found in our neighbor, especially the vulnerable among us, is the critical motivation to take these important steps. May God bless you and keep you safe."
– Bishop Edward J. Weisenburger