Fig. 4From: Dengue type 4 in Rio de Janeiro, Brazil: case characterization following its introduction in an endemic regionDENV-4 NS1 antigenemia according to the disease severity. a NS1 antigenemia on DENV-4 cases positive for NS1 ELISA; (b) NS1 antigenemia on DENV-4 cases previoulsy negative by NS1 ELISA and positive after heat-mediated immune-complex dissociationBack to article page