Hello doctor, my son is 3y n 7monthe old. he had cold for past months and had a fever from Jan 15 then it settle down in Jan 23 and come after few days so We consult a paediatrician for it they suggest me some syrups and blood tests. I took the blood test called CBC, Dengue NS1 , CRP and blood culture and sensitivity. All the tests are negative but CRP is 172. what is the problem for my son ...? what do you suggest for further action?