FLU VACCINE --- A syringe is filled with a flu vaccine in San Francisco in this Oct. 16, 2004, file photo. In a recently-released paper, the Vatican's Pontifical Academy for Life reaffirmed a person's right to abstain from receiving vaccines made from aborted fetuses, but it said such a choice must be made after carefully considering whether refusing the vaccination would pose serious health risks to the child and the larger public.

Photo by Reuters