flu” spectrum. Influenza is widespread, and causing local crises. On Wednesday, Boston’s mayor declared a public health emergency as cases flooded hospital emergency rooms. Google’s national flu trend maps, which track flu-related searches, are almost solid red (for “intense activity”) and the Centers for Disease Control and Prevention’s weekly FluView maps, which track confirmed cases, are nearly solid brown (for “widespread activity”). “Yesterday, I saw a construction worker, a big strong guy…
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