Herm, Malaria officinalis is made from the rotting plants on which the mosquito breeds and which obviously generates the plasmodium. Thus, as an almost identical substance, it is capable to produce the substance in the blood that immediately destroys the plasmodium, which enters the blood after the sting. I reckon off-hand to have treated at least between 5000 to 10000 cases with it ( having extensively lived in India, where it is almost endemic) and as I said, I have to yet see it fail. Here in Oz we have a type called Ross River virus and it has more severe symptoms than malaria. Yet everytime that I have given it, people have gone back to the region where they got the disease and not been affected. It is part of a travel kit I sell for the tropics and I never have heard that they needed to use Nat.m. or China, except for friends who had never heard of it. Nat.m. by the way, can kill a case when given during the fever. You must always wait till the temperature comes down. Then give Na.m. followed by Mal.off. and you case is clinched. The Nat.m. will bring on a last and milder bout of fever and bingo! Mal.off. no more fever.