Some states in the Central and Midwest regions are reporting high or very high flu activity.
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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Wastewater COVID detections last week declined from the high to the moderate level.
A review and meta-analysis also finds no impact on length of stay in the emergency department, return visits, or hospitalization.
Flu is rising in central states, and COVID levels are highest but on the decline in southern states.
Flu activity increased in five regions: the Northeast, New England, the Middle Atlantic, the Midwest, and the Central states.
Influenza B proportions are rising in regions where flu activity is trending upward.
The results suggest that the flu virus may have a more specific role in destabilizing and rupturing atherosclerotic plaques, the researchers say.
Influenza B activity is fueling rises in the Midwest and Central regions.
Flu indicators are rising in some parts of the nation, especially the Midwest and South-Central regions.
The results highlight the importance of supporting older adults so that their decision whether to have surgery isn't based on financial factors, the authors say.
Though H10 viruses have infected humans before, the woman's illness marks the first known case involving H10N5.