Figure 1

Chest x-rays of a patient with primary H1N1 (swine-origin influenza A) influenza pneumonia on day 1 (a) and day 6 (b) of hospitalization.
Chest x-rays of a patient with primary H1N1 (swine-origin influenza A) influenza pneumonia on day 1 (a) and day 6 (b) of hospitalization.