question: hi, glad that i found this site, my 2 year old son suffered dengue DHF last week not once but twice the first is on July 13-18 and the 2nd was Aug. 13-17, we were at the stage of recovery right now. yesterday i saw some welt on his left foot and suspected that it was bitten by the aedes aegypti mosquito again. now, what can I do to prevent the dengue fever I red a lot of and found out that 5-7 days dengue symptoms may appear after being bitten. I want to control it before symptoms may occur. hope you will help me. thanks a lot.