The Differences Between Pfizer Moderna and AstraZeneca Vaccines

The Pfizer and the Moderna don't use aborted fetal cell lines in their research. The AstraZeneca does rely on aborted fetal cells for the replication of, as far as I understand, for the creation of the vaccine. It's called cooperation because the person concerned is doing some action with somebody who is the main operator as it were. So you're cooperating. And it's a matter of evaluating whether that cooperation is sinful or non-sinful. That depends on how you contribute to the moral act of the principal agent.