Call me a coward but I'll always take something when in a zone. Larium is supposedly effective but only for short term use, after a few months it really f**ks with the system.
I've heard that the artesun or whatever its called works wonders.
I keep a kit with me, two lab slides and a prick, if you get symptoms, take a thin and thick sample on the slides, THEN take fansidar or whatever works in your region. Apparentely, diagnosis is much harder if the blood sample is taken after treatment.
Touch wood (forehead) no dose yet.
