Wudang
BOFH
The register reports that US stem cell stocks are "contaminated". From the link
The problem is that current stocks have taken up a "non-human molecule called N-glycolylneuraminic acid or Neu5Gc" - probably when they were grown in a lab culture containing animal-derived materials from mice and calf foetuses. Neu5Gc is found on the surface of animal cells, but the human immune system attacks it - the major reason for transplanted animal organ rejection in humans