The letter from the CCCB, written by the bishops of Alberta and the Northwest Territories, explains why taking the COVID-19 vaccine is morally permissible according to Catholic teachings. The Pfizer/BioNTech and Moderna/NIH vaccines have been deemed “ethically sourced” by the Canadian Catholic Bioethics Institute (CCBI) and others. With the Lozier Institute, the CCBI has been following the development the vaccines and you can learn more about their analysis at this Link