Although CRP levels were not significantly high in patients with DHF compared to patients with DF, in those who were recruited ≤4 days of illness (before development of vascular leakage), 9/24 (37.5%) who proceeded to develop DHF and 5/40 (12.5%) of those who developed DF had CRP values > 20 mg/L). Here, CRP is linked to Dengue hemorrhagic fever.