It seems that Swine Flu is back and ready for action, Phase 6. Fortunately, for a large majority of patients, it is just a bad flu. For 1% of the patients, however, it causes acute respiratory distress syndrome. In other words, H1N1 eats their lungs. The below graph demonstrates why mitigation must be attempted. Current estimates make this a Category 3 or 4 pandemic, which is nothing to ignore.