Plenty of the tainted product came right back to this country from Canadian processing. The U.S. hemophiliac population was decimated, and very early, though all the public heard about was AIDS in the gay world.
We suspect -- but were never able to prove -- that a goodly amount of the prison blood was illegally processed by U.S. pharmaceuticals, which had far greater capacity than the one in Canada. Perhaps someday whistleblowers will come forward with the rest of the story.
Thanks for the info, T'wit.