i have been flying around africa for the last 2 years and have never taken any precaution medicine wise. would have to be on it forever! and the story of g&t is nonsense.... would have to consume serious amounts of tonic water to get remotely close to what is needed!
tabart spray/ stick/ cream, long clothes, collar shirt, tucked in shirt, socks, shoes and closed windows and some aircon or a fan! those treated mozzi nets also great! and coartem on standby and a local doctor with knowledge of the local malaria!