Hi, Thanks for posting in HCM. Dengue is a viral fever transmitted by mosquitoes. It is usually a high grade fever associated with nausea, vomiting, tiredness and hemorrhagic tendencies. What you are experiencing coldness and sore throat is not due to dengue but might be due to prodromal symptoms of bacterial infection. Also redness at the mosquito site bite cannot tell weather it is dengue or not and could have happened due to local allergic reaction. Well, if you need to confirm weather you are infected with dengue or not, kindly get the following investigations done after a week: 1. Complete blood count with peripheral smear highlighting platelet count. 2. Dengue test for antigen and antibodies. If it doesn t indicate anything related to dengue, then your doubt is cleared. For sore throat, kindly gargle with warm salt water twice daily and take decongestant syrup twice daily. Hope the information provided would be clear. All the best.