I have RH- blood and, luckily, had no problems with either of my children. I have often wondered why my father was an only child but never asked. He was the maternal grandson of the subject family. I am now in possession of a photo that was taken around 1900 +/- ? number of years. It is from a glass negative. This photo is possibly of my ggrandparents and their children. I know of only two children of that marriage and there are five in the picture. I have since found that three died at varying young ages. With only that information, I am inclined to wonder if they died because the blood type. What might have been cited, back then, as cause of death? Thank you very much. Barbara in MA