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Effects of Danshen on DTH responses. After two immunizations with KLH for assessment of antibodies to KLH, BALB/c mice received a footpad challenge (100 μg KLH in 25 μL saline) 21 days after the second immunization. The DTH response was measured 24 hr later. Results of the 0% (n = 16), 0.5% (n = 8), 1% (n = 11), and 2% (n = 9) Danshen are shown as mean ± SD; *indicates that the 1% Danshen group significantly differs from the 0% and 0.5% groups.
