The United States is using three-strain flu vaccines with the same components as those used in Southern Hemisphere vaccines.
The loss of activity is equivalent to 15% of the US population becoming completely immobile for 1 day.
Adult COVID-19 patients also infected with the flu are 4 times more likely to need mechanical ventilation and 2.4 times more likely to die.
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Hospitalizations, also on the rise, are highest in seniors and young children.
Most flu viruses were influenza A, and of subtyped samples, about two-thirds were H3N2.
Hospitalizations are also up, especially in seniors and young children.
The Traveler-based Genomic Surveillance program will expand to provide early detection of flu and other respiratory viruses.
COVID-related hospitalizations are up a bit, flu-like illness is climbing, and officials confirm more avian flu outbreaks on poultry farms in 5 states.
Influenza A is most common, with H3N2 seen in about two-thirds of subtyped samples.
In influenza news, US flu cases appear to be rising, and officials have confirmed more avian flu outbreaks in US poultry.
Many public health preparedness directors had to tap into state or national antiviral stockpiles.
Test positivity is still very low, and most subtyped samples are the H1N1 influenza A virus.
A few counties are reporting high levels of hospitalizations, especially in the Upper Midwest and West.
