Figure 1From: Bench-to-bedside review: Bacterial pneumonia with influenza - pathogenesis and clinical implicationsComplexity of combined viral/bacterial and post-influenza pneumonia. Severe bacterial pneumonia following influenza can be subdivided into combined viral/bacterial (left) and post-influenza pneumonia (right). During combined viral/bacterial pneumonia, the virus, the bacteria and the host all interact with each other. The severity of post-influenza pneumonia is due to virus-induced changes to the host that affect the course of bacterial infection.Back to article page