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Sidebars typically contain supplementary information, including related topics or lists of sources for further reading (Example and Example ). While the US Centers for Disease Control and Prevention is fairly confident it has a handle on this year’s flu season, it is keeping a wary eye on avian flu activities in Asia. Avian flu is worrisome because it can cross into the human population, and the infection has proven to have a high mortality rate. Earlier this year, an outbreak of influenza A (H5N1) occurred in Asia, with 100 million birds dying of the disease or being culled to contain Less