<s>[INST] 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. [/INST] Hi...in dengue fever, rather than platelet count...most important things are - 1. Swelling and water accumulation all over the body.2. Decreased urine output3. Respiratory distress4. Seizures5. Regarding lab tests - PCV or Hematocrit is more important than platelet count. If it is above 38 and the kid is not Chat Doctor. What you need to do is - watch for the above danger signs and if they develop rush to the nearest emergency room. Regards -  </s>