A droplet falls from a syringe after a health care worker was injected with the Pfizer-BioNTech COVID-19 vaccine at Women & Infants Hospital in Providence, R.I.

FILE – In this Tuesday, Dec. 15, 2020 file photo, a droplet falls from a syringe after a health care worker was injected with the Pfizer-BioNTech COVID-19 vaccine at Women & Infants Hospital in Providence, R.I. The Vatican has declared it “morally acceptable” for Roman Catholics to receive COVID-19 vaccines based on research that used fetal tissue from abortions. The Vatican’s watchdog office for doctrinal orthodoxy said Monday that it addressed the question after receiving requests for guidance. (AP Photo/David Goldman, File)