To quote Dr. Frieden of the CDC:
"Although there has been some progress, today and every day, more than 200 Americans with healthcare-associated infections will die during their hospital stay”
It should be clear though that all infections are likely not preventable. The current state of infection prevention science cannot eliminate all infections. For the interested reader, I will refer you to this paper on estimating the proportion of healthcare associated infections that are preventable .
Infection prevention science is not yet salvation from hospital acquired infections.