Explanation. I did not think type O was rare. I was replying to a question and stated that as appears on another website, type O is disproportionately prevalent in both Ireland and among the Berbers of North Africa. This may or may not be what the original comparision is in the TV documentary and book "The Course of Irish History". All I remember is that there was come similarity of blood types between the two populations mentioned in the book. Michael O'Hearn --------------------------------- 8:00? 8:25? 8:40? Find a flick in no time with theYahoo! Search movie showtime shortcut.