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Mean percentage of live larval recovery from mice that received the transfer of whole immune sera, purified IgM, and purified IgG recovered 3 weeks (A) and 5 weeks (B) after booster immunization with live L3. The data represent the means and standard deviations of the results for 10 animals per group. The asterisks indicate statistical differences (P ≤ 0.05) from control values.
