Utilizing the adoptive technique of Mitchison, it has been shown that spleen or lymph node cell suspensions of paralyzed mice do not protect normal mice from subsequent challenge with the homologous pneumococcus, suggesting that there are no antibody forming cells in the donated suspensions. Paralyzed mice can be protected by the transfer of spleen or lymph node cells from immunized mice. Immune mice, injected with a paralyzing dose of SSS, are no longer immune.

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