DNAgenie
Yes, I saw this too, and it certainly puts to rest any talk of survivors.
More generally, there is indeed no cure for haemophilia, although it can now be 'managed' much better than it used to be, and the danger of joint damage is much reduced. Alexei was never going to be healthy, and the effects of joint damage caused by bleeds would get worse as he got older. Some 20 years ago, as a trainee solicitor, I was involved in the HIV haemophilia litigation in the UK (in the 1980s most haemophiliacs then living were infected with HIV through contaminated Factor VIII and an action for negligence was brought against the NHS). My main role involved going through the medical records of about 30 haemophiliacs who were treated at a particular hospital, and it was noticeable that those in their 30s and 40s were rarely able to hold down jobs, partly because of their health and partly because of their education having been interrupted by long periods in hospital. They were also having to have hip and knee replacements as a result of earlier joint damage (obviously this would not have been possible for Alexei had he lived into adult life).