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Koszinowski, Ulrich H.; Volkmann, B. and Thomssen, R. (1975): In-vitro demonstration of cell-mediated immunity to vaccinia virus in man. In: Zeitschrift für Immunitätsforschung, experimentelle und klinische Immunologie, Vol. 148: pp. 451-461 [PDF, 1MB]

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Cell mediated immunity to vaccinia virus in man was studied by lymphocyte transformation. Vaccinia antigen, propagated on BHK-21 and Vero cells, could be used successfully for in-vitro testing after partial purification as well as crude infectious homogenates. Vaccinia antigen preparations were effective both in the infective and the inactivated state. Inactivation was usually accompanied with a certain loss of stimulating activity. Development of cell mediated immune response in-vitro after first vaccination was investigated in 17 adults. Vaccinia virus specific lymphocyte transformation was seen in the second week after vaccination in all cases. Following revaccination no increase of lymphocyte transformation ratio could be observed in 11 persons studied. At the same time the titers of humoral antibodies were elevated.

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