Footnote
a 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.
a 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.