Incidentally, for those who didn't know, Malaria is not a trivial disease. Its estimated that there are ,annually, anywhere between 350-500 MILLION cases per year, and an estimated 1-3 MILLION deaths per year, directly attributable to Malaria.
If you are travelling, check whether it is a malaria risk area.If it is, don't Fosters about -get yourself prescribed a course of anti-malarial drugs - and not some crappy homeopathic or naturopathic useless remedies - then take them, the full course, even if you get back home and you don't think you have it, or don't have any symptoms.