Figure 2. The 40 bp internal repeat is dispensable for lytic replication in the lung.

C57BL/6 mice were i.n. infected with 5×10⁴ PFU. At the indicated time points after infection, lungs were harvested and the virus titers of lung homogenates were determined by plaque assay on BHK-21 cells. Each symbol represents a single mouse. The dashed line indicates the limit of detection which is 50 PFU [31].