Abstract: Compositions, systems, and methods for enhancing the ability of a subject to heal itself following an infection include administering a composition that includes transfer factor to a subject. Administration of such a composition or combination of compositions to a subject may result in improving the subject's overall antioxidant profile, increasing the concentration of chemical antioxidants present in the subject, increasing the efficiency with which the treated subject's enzymatic antioxidants work, increasing the efficiency and/or activity of the treated subject's detoxification enzymes, and improving cellular and molecular health of the subject.