Greg addresses some concerns one might have regarding vaccinations.
Some people are concerned about vaccinating their children. They think it may not be right. Someone suggested that it's trying to improve on God’s immunity system. I think it's really trying to take advantage God's immunity system. The way our systems are developed, are designed, are that if we get a little bit of the bad thing, then our immune system bounces back and creates some defenses against it, so we don't get it again. This is exactly what vaccinations do. They give us a little bit of the bad stuff so that our immune systems respond, so I don't think there's a problem there.
I have heard objections that have to do with the way vaccines are developed. In some cases, vaccines in the past have come from tissues from aborted fetuses, and this has been a concern to people. I don't think there's a reason to worry, though, and here's why: It isn't as if using the vaccine that came from a questionable source is itself immoral, because by using it you are not provoking more of that activity.
There's a lot of science that been done productively that we benefit from. Cadavers from the morgue - many of those people were murdered and their bodies were unclaimed. Does the fact that they were murdered, the way they died, and the way they got their corpse was immoral somehow cast aspersions on the legitimacy of the medical research or medical benefit that we get from them? I don't think so. I think they're worlds apart.
If someone is still personally uncomfortable with using vaccines because there might be that association, then that's up to them individually. I don't think there's a clear moral case that can be made against vaccines for that reason.