Figure 28: Risk factors reported for cases with laboratory confirmed influenza A(H1N1)pdm09 with enhanced surveillance data, Australia, 2009, by hospitalisation and mortality status and proportion This figure presents risk factors, as a proportion, that were reported for cases with laboratory confirmed influenza A(H1N1)pdm09 with enhanced surveillance data during 2009 by hospitalisation and mortality status. Chronic respiratory conditions represented the most commonly reported underlying medical condition.