transfer factor
(TRANZ-fer FAK-ter)
A substance made by some white blood cells. Transfer factor from one person’s white blood cells may be able to cause a specific immune response when injected into the skin of another person.
The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.
Updates regarding government operating status and resumption of normal operations can be found at opm.gov.