A saline vaccine prepared from our stock strain of M. T. II produces in mice definite protection against the homologous strain, and perhaps some slight cross-protection against M. T. I also. Two vaccines prepared with our stock strain of M. T. I failed to produce any definite protection in mice even against the homologous strain, nor was any cross-protection afforded against M. T. II.
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Copyright, 1924, by The Rockefeller Institute for Medical Research New York
1924
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