statement by the chairmen of its Committee on Doctrine and Committee on Pro-Life Activities.The bishops said it is morally acceptable for Catholics to use either of the two vaccines approved for use in the U.S. — made by Pfizer and Moderna — despite a “remote connection to morally compromised cell lines.” This entailed the use of fetal cell lines for lab tests seeking to confirm the vaccines' effectiveness.Another leading vaccine, made by AstraZeneca and approved for use in Britain and some other countries, is “more morally compromised,” and should be avoided if there are alternatives available, the bishops said.Coinciding with the USCCB, four bishops in Colorado issued their own statement taking a somewhat more negative stance on.