N.C. Gen. Stat. § 130A-412.30
The procurement, processing, distribution or use of whole blood, plasma, blood products, blood derivatives and other human tissues such as corneas, bones or organs for the purpose of injecting, transfusing or transplanting any of them into the human body is declared to be, for all purposes, the rendition of a service by every participating person or institution. Whether or not any remuneration is paid, the service is declared not to be a sale of whole blood, plasma, blood products, blood derivatives or other human tissues, for any purpose. No person or institution shall be liable in warranty, express or implied, for the procurement, processing, distribution or use of these items but nothing in this section shall alter or restrict the liability of a person or institution in negligence or tort in consequence of these services.
N.C. Gen. Stat. § 130A-412.30