A highly significant number of PFC appeared within 24 hours which ollmlnated in a maximum population at 3 days instead of the 5 days required for the first injection: thus, 3 months after the initial stimulus the same dose of antigen now evoked the appearance of twice as many PFC in 3 days instead of the 5 days required initially.
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Humoral and cellular aspects of the immune response to the somatic antigen of Salmonella enteritidis.
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