[bmelton]

I'm glad they've added that disclaimer. My mother contracted HIV from donated blood she received during surgery.

I'm sure that testing is much better in the decades since then, and I'm sure that non-zero should be read as infinitesimal in this modern era, but the chances of contracting something may not be non-zero, and if another AIDS-like virus were to come along and it were to take a few years before it became known and detectable, those might be more susceptible to being transmitted through implantation.