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Update: Influenza activity around the U.S.

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After holding at low levels in October, influenza activity began creeping higher in November, CDC reports. Based on testing at public health and clinical laboratories nationwide, confirmed cases ramped up during October 2–December 17, 2016.

After holding at low levels in October, influenza activity began creeping higher in November, CDC reports. Based on testing at public health and clinical laboratories nationwide, confirmed cases ramped up during October 2–December 17, 2016. The timing of the shift is ahead of year-earlier trends, with increases in influenza activity not surfacing during the 2015–16 season until January. Most of the positive cases so far this season have been categorized as Influenza A (H3N2) viruses, which could point to a more severe season ahead—especially for the very young and for older adults. While no related pediatric deaths have been documented in the 2016–17 cycle as of December 17, 676 people have been hospitalized because of influenza since October 2, with patients aged 65 years and older leading the way. Roughly 60% of Americans had not received influenza vaccination for the current season as of early November, although experts stress that this is the best way to avoid the virus and any complications that might arise from it. According to the data collected by CDC, nearly all viruses characterized this season have been similar to the components of the 2016–17 Northern Hemisphere trivalent and quadrivalent vaccine formulations.

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https://www.cdc.gov/mmwr/volumes/65/wr/mm655051a5.htm?s_cid=mm655051a5_w

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