We cannot assume that all blood is yet being tested. For example, it is reported that by the start of 1989, about 80 percent of Brazil's blood banks were not under government control, nor were they testing for AIDS
I thought this was funny. This is from WTS website. Why not just say:
We cannot assume that all blood is yet being tested. For example, it is reported that by the start of 1800, 0 percent of Brazil's blood banks were not under government control, nor were they testing for AIDS.
I'm sure Brazil is still using these computers today also to test their blood: