Fig 6.

Virus production at the apical site of air-liquid interface cultures of reconstituted human airway epithelia over a prolonged time period. Viral RNA loads measured by using qPCR from infected samples collected at the apical side of tissues infected with 9 different respiratory viruses are shown. Each tissue was inoculated with 10⁶ RNA copies of the indicated virus, and tissues were washed 3 times after 4 hours; samples were then collected from the apical surface at the indicated time point (n = 4).