Human Male AB Off-the-clot serum is collected from healthy male AB donors. The blood is collected and allowed to coagulate naturally, it has not been exposed to any anticoagulant. Each individual unit is tested and found negative for all required viral markers via FDA-approved methods: HIV-1, HCV and HBV by Nucleic Acid Test, Parvo B-19, WNV and HAV by Nucleic Acid Test, Anti-HIV 1/2, Anti-HCV, HBsAg & syphilis. Additional testing provided by Access: ZIKA, HEV, Chagas, Anti-HBC, Mycoplasma, Endotoxin, USP Sterility, Hemoglobin, Osmolality, pH, Chemistry and Species testing. Units are pooled, heat inactivated at 56 degrees and 0.1 micron sterile filtered under cGMP guidelines.