Induction of cytokine mRNA in RSV-infected HCE cells. RNA isolated from infected cells at different times p.i. were subjected to quantitative Real Time RT-PCR as described in Methods. The relative amounts of RNA were expressed as the ratio of mock-infected control value (fold induction). Each box represents a specific cytokine as named; the cognate receptor(s) are indicated in parenthesis. Each data point is derived from three independent infection experiments with the error bar as shown.