<s>[INST] Hello sir, my son is 6.5 yrs of age, weight 20.6 kgs, is down with fever since last 6 days, case of cough, sore throat, fever peaked @ 103.4 f now around 100, blood test 2 days before revealed low hb, rbc, and WBC of 4800, esr 12. Blood test today reveals hb 12.5, normal rbc, slightly high lymphocytes and slightly low polymorphs, [/INST] hi, there are many cause for that, most common in children is viral fever. or some other infection. so first of all you need to search for the cause. it may be upper respiratory tract infection, it may be viral or malaria or could be any thing. so first diagnose the cause and then take treatment accordingly. thanks for using health care magic. </s>