haven't read through all the replies but my advice (from one who has lived in malaria areas for twenty five years) is to take the prophylatic recommended for the area you are going to. Just because one brand works in country A does not mean you will be protected in country B. However, no pill will give you 100% protection so wear long trousers tucked into boots and long sleeved shirts from dusk onwards - be liberal with the insect repellent, use a mossie net of the correct size for the bed and tuck it in the mattress, don't leave doors and windows open unless they are gauzed, have a nice holiday!