New England Journal of Medicine 2014; 370:1335-1342. Please download the pdf-file from the nejm Website! A number of viruses have pandemic potential. The most recent global pandemic was caused by the influenza A (H1N1) strain, which was first detected in North America in 2009. The 2009 H1N1 pandemic presented a public health emergency of uncertain scope, duration, and effect. At the request of the WHO, an international committee reviewed the experience of the pandemic, with special attention given to the function of the 2005 International Health Regulations (IHR) and the performance of the WHO. The most fundamental conclusion of the committee, which applies today, is not reassuring: “The world is ill prepared to respond to a severe influenza pandemic or to any similarly global, sustained and threatening public-health emergency