IMMUNIZATION OF RABBITS TO INFECTIOUS PAPILLOMATOSIS.
Two intraperitoneal injections of either infectious or non-infectious rabbit papilloma suspensions actively immunize rabbits against papillomatosis. The capacity of the non-infectious suspensions to immunize is considered as evidence that they contain papilloma virus even though none can be demonstrated by the usual infection test.
Department of Animal and Plant Pathology of The Rockefeller Institute for Medical Research, Princeton, N. J.
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