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Kinetics of dengue NS1 levels in acute dengue: levels of serum dengue NS1 antigen were measured twice a day by enzyme‐linked immunosorbent assay (ELISA) in 25 patients with dengue haemorrhagic fever (DHF) and 11 patients with dengue fever (DF) from the time of admission until discharge. The means are shown along with error bars indicate the standard error of the mean; (–) indicates the titre above in which the NS1 ELISA gives a positive result.
