Glenn Reynolds reports on British Muslims not inoculating their children against childhood illnesses because they contain substances that Muslims should not ingest.
Dr Abdul Majid Katme, head of the Islamic Medical Association, says almost all vaccines contain un-Islamic "haram" derivatives of animal or human tissue, and that Muslim parents are better off letting childrens' immune systems develop on their own.
Dr. Reynolds calls it "Evolution in action."
It is worth noting that this will likely not have much effect one way or another. I didn't get any of the childhood disease inoculations and neither did my wife. In fact, the population of the earth reached 4 billion people just fine without them. Having said that, the purity issue is a bit rigid and cult-ish. The story relates that some other Muslim groups think it is ridiculous as well.