"Yet another objection concerns the problem of scandal. When a Catholic allows himself to be immunized with these vaccines it may appear to others that he acts hypocritically. Catholics, it will be said, talk a lot about moral principles, but when it comes to their own health or that of their children, they appear willing to abandon all previous moral conviction. There would appear to be no objective basis for the charge that one who uses these vaccines cooperates in moral wrongdoing; therefore, any scandal caused by their use must be purely subjective in character. Appearances, however, can be important. For this reason, some Catholics decide to refuse vaccination in order to express their strong opposition to the practice of abortion. Still others are convinced, contrary to the arguments offered here, that vaccination does involve some form of cooperation with abortion. They believe that refusal is the only way to avoid complicity. Nonetheless, refusal appears to represent a course of action that goes beyond what is morally required. When carried out in the light of a fully formed conscience, heroic acts based on sound moral principle can be highly praiseworthy. That would seem to be the case here. Those in the medical profession who refuse to be immunized with tainted vaccines often suffer harm to their careers. Health care facilities require that all employees be properly immunized against infectious diseases. When health care employees refuse to do so, they can expect to be dismissed from their posts."