A mosquito-killing drug can reduce malaria incidence in young children by 20 per cent results of trial has showed. Repeated mass administration of the drug ivermectin every three weeks during the malaria transmission season can reduce malaria cases by a fifth among children aged five or younger showed the trial published in The Lancet journal. Ivermectin is commonly used to treat parasite infections from river blindness and scabies to head lice. Ivermectin reduces new cases of malaria by making a person's blood lethal to the mosquitoes who bite them killing mosquitoes and therefore reducing the likelihood of infection of others