The Raman lines at 1123 cm−1and 1445 cm−1 are present both in normal and dengue
infected blood sera. The line at 1123 cm−1 arises from C C stretchingmode
of protein and lipid labeled for IgG [13,14,16], whereas the
Raman line at 1445 cm−1 arises from CH2 bending mode, assigned
for fatty acid, lipid and collagen [13,14,16]