We did a trip through the norhtern Kruger Park and then into Mozambique from 15 April to 3rd May travelling through to Vilankoulos and southwards back to South Africa. I took Demal200 every day and although we were bitten a lot, did not get infected. On returning I had to see my homeopath and she tested me for malaria and said I was not infected! I will certainly use it again.