Actually a significant population in the US was infected by blood transfusion; the US didn&#x27;t start properly&#x2F;universally screening blood and taking precautions for hep C until 1992.<p>This is why there&#x27;s a spike in infection rate among older people, and why hep C is considered a looming cost crisis for Medicare -- we don&#x27;t yet know the full extent of the infectious disaster that was unscreened blood, but it&#x27;s ticking away inside anyone who received a transfusion prior to 1992.