I'm coming to this late, but want to share my own experiences with blood transfusion deaths of Jehovah's Witnesses. The time period was from 1951 to 1975 and in a relatively small geographical region of Los Angeles (Hollywood area only) and Riverside Counties of California.
I can't remember the names or exact years, but here are my personal connections to blood transfusion deaths and one near death:
When I was about 10 (1953) and in the Riverside (CA) Central KH, a young sister died from a hemorrhage. If I remember right she ignored what she thought was an excessive menstrual flow and became anemic. She was taken to Riverside Community Hospital, refused a blood transfusion and died within 48 hours. My family attended her funeral and the fact that she "faithfully" refused a transfusion was mentioned during the service.
When I was about 15 (1958) a young newly married couple had just been married and were returning home in a private airplane. It crashed and both were badly injured. The husband died at the scene and the young woman was rushed to the hospital with severe injuries. According to my parents (my father was a servant at the time) the woman had lost a lot of blood but could have survived her injuries - but refused to have a blood transfusion and died within hours. That too was mentioned at their funeral.
A young couple who were very close to my family had just had a baby. The baby was in her mother's lap when their car was involved in a front to rear collision. The baby was crushed up against the dashboard (this was before seat belts and child seats). All three of the passengers were rushed to the hospital. The father and mother had minor injuries and the baby, while seriously injured, could have survived. The parents refused a transfusion for the baby and it died within hours of the accident.
When I was 17, a JW mother in her mid-30s attending the Magnolia Center (Riverside, CA) congregation was diagnosed with a serious blood disease. Her doctor told her that they would have to completely transfuse her blood and continue to fight anemia for several months with additional transfusions. When she refused the doctor told her that she should go home and settle her affairs as she had less than two weeks to live. She died ten days later. I attended her funeral too (I'd dated her niece) and the story of her faithful decision was mentioned by the brother giving the memorial talk.
When I was 18, I was asked by a JW friend of mine if I could drive over the his house and drive his mother to the hospital. I remember their car very well (it was similar to the Plymouth in Steven King's "Christine"). She could not drive herself because she had just had surgery on her female organs and could not use her feet to push the pedals. My friend went along for the ride. As I remember it, we drove home after leaving his mom at the doctor's office because she had to be transferred to the hospital by ambulance. I'm not sure what happened, but I heard later that she had to refuse a transfusion and ended up in the hospital for several weeks because she had to be so closely monitored. I heard that she did get extra fluids and "expanders" to help her survive. I lost contact with them because they lived in the Arlington (South Riverside, CA) congregation and we rarely made it over that far. I count her as a survivor, but I'm not sure if she had more problems after that or not.
The last incident that I was aware of took place in the West Hollywood (Fairfax) congregation around 1968. I was not going, but my wife was still a JW at the time. I do not know the details, but I know that a sister who was a part time actress was taken to Cedars-Sinai Hospital in very bad shape. I thnk it was female problems again or maybe a miscarriage - but she too (or her husband) refused blood and died within a day or two. I did not go to the funeral and could not get off work to take my wife - and she barely knew anyone there anyway. But I do remember that the incident caused us to discuss what we would do if she or our baby girls was in a situation where they needed a blood transfusion. Being out by then I made it very clear to her that I would insist on our girls having transfusions, but she could make her own choice. I think my wife was somewhat relieved by my hardline position since it would be me and not her that would be held reponsible and end up dying at Armageddon in 1975.
So that is 5 down and only one survivor in a very small geographic area during just a few years. Some of those persons may have died anyway, but the point of the above discussion has been that "not that many cases could have occured over the past 50 years." 250,000? Maybe not, but I know that there were a lot of stories going around during the years I was a JW or associated that the blood transfusion issue was fairly common. It was a always a discussion during assemblies. As a teenager I often spent many sleepless nights worrying that I might be injured and die before I had a chance to have sex because of the no blood rules. I was lucky then and later in my life when I had open heart surgery that did not require any blood transfusion even though I was OK with having it if needed.
And I just remembered - we had at least 2 young hemophiliacs in our area. I don't know whatever happened to them but their odds were not good.
JV