Figure 2From: Characterisation of a wild-type influenza (A/H1N1) virus strain as an experimental challenge agent in humans Kinetics of Virus Shedding in infected subjects. Viral shedding was measured in nasal wash samples collected daily during the quarantine period by means of rRT-PCR. A virtual quantification tool was applied to the rRT-PCR Ct values to generate an estimate of viral copy number [14]. The graph shows the mean copy number + SEM from subjects who became infected.Back to article page