摘要： Qinghaosu was given to mice infected with P. berghei at the time when the para-sitaemia was 30% and when the PFC and RFC responses of the infected mice weremuch lower than those of the healthy ones. The dose given was 300 mg/kg in 7 days.The mice were immunized with sheep erythrocyte on day 0, 7, 14, 21 respectively