[philjohn]

Similar and just as scary - tainted blood products taken by haemophiliacs leading to countless HIV infections, and plenty of deaths from AIDS.

[LyndsySimon]

We also seem to be coming to the realization in the last few years that HPV is likely spread through the sterilization and re-use of gynecological equipment.

[philjohn]

Prion diseases as well - they can survive an autoclave.