Figure 4. Lytic replication in the lungs of C57BL/6 mice.

Mice were inoculated i.n. with 5 × 10⁴ PFU of the indicated viruses. Lungs of mice were harvested at day 3 (A) and at day 6 (B) post infection (p.i.). Virus titers were determined from organ homogenates by plaque assay. Each symbol represents an individual mouse, and the bars represent the median. The data are compiled from two independent experiments.