How safe is a bone transplant?

Probably not as safe as you would like. In fact, it has been shown that irradiation alone cannot sterilize grafts with HIV. The graft has to be extensively screened along with irradiation to decrease risk of transmission. (See: Hernigou, P and G Marinello, et al. [Influence of irradiation on the risk of HIV virus transmission by bone allograft]. Rev Chir Orthop Reparatrice Appar Mot. 1998. 84(6): 493-500).

As a result, because of BTS forged documents, recipients don’t know the true age of the bones. For recipients in need of young bone for surgery, old bone could cause a collapse. Thus, you could be worse off with "old brittle bone" that is tranplanted into you.

This would leave you with few choices, since, for surgery, where the bone allograft was fused, removal is harmful if not impossible. Worse yet, there are long incubation periods of some diseases make it hard to know if infected.

For example, the infectious protein in mad cow disease, Creutzfeldt-Jakob Disease (CJD), and Kuru have long incubation periods. Prion Disease has Incubation of years, no test to identify it, and no treatment. As a result, it is lethal. That is really scary. In fact, The American Red Cross is refusing donations from people who have spent a cumulative three months in Great Britain or six months in any part of Europe since 1980.

And according to the FDA, though the unscreened bones were processed, the actual risk of infection is unknown.