An outbreak of viral hepatitis B associated with transfer factor administration

An outbreak of viral hepatitis B in patients of the allergological clinic of the teaching hospital in Olomouc in connection with application of the crude non ultrafiltrated transfer factor is described. The epidemic was the first one of this kind observed in Czechoslovakia in connection with this blood derivative. A total of 32 persons from 13 districts in Czechoslovakia fell ill, yet thanks to close cooperation of epidemiologists of many districts and regions of Czechoslovakia the epidemic was brought under control in its full extent.