Fig. 2
From: Role of NS1 antibodies in the pathogenesis of acute secondary dengue infection

Correlation of NS1 antibody titres with platelet counts. Correlation of NS1 antibody titres in patients with acute secondary DENV1 and DENV2 infection with platelet counts. Serum anti-NS1 antibody titres were measured throughout the course of illness by ELISA and correlated with circulating platelet counts in patients with (a) DHF due to DENV2, n = 23 (Spearmans’ r = −0.3, p = 0.008), (b) DF due to DENV2, n = 12 (Spearman’s r = −0.39, p = 0.009), (c) DHF due to DENV1, n = 10 (Spearman’s r = −0.3, p = 0.03), and (d) DF due to DENV1, n = 10 (Spearman’s r = −0.17, p = 0.30)