Levels of SFC in DF and DHF patients in response to peptide pools containing peptides from structural (AnC, C, PrM, and E) and nonstructural (NS1, NS2A, NS2B, NS3, NS4A, NS4B, and NS5) regions. Means after subtraction of control values (no peptides) are shown. The mean for each peptide pool is indicated by a bar. Responses were considered significant when a minimum of 50 SFCs per 106 PBMC were present per well, representing at least twice the number of SFCs in negative control wells.