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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Some states in the Central and Midwest regions are reporting high or very high flu activity.
Wastewater COVID detections last week declined from the high to the moderate level.
The latest round of free at-home tests began in November 2023 heading into the winter respiratory virus season.
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.
COVID-19 patients with acute kidney injury were at 69% lower risk of death than those with acute kidney injury due to other diseases.
Flu activity increased in five regions: the Northeast, New England, the Middle Atlantic, the Midwest, and the Central states.
October flu vaccinations were greater in children with October births compared with other birth months, with 49% of those born in October also vaccinated in October.
Though influenza A is still dominant, some countries are seeing influenza B rises.
Influenza B proportions are rising in regions where flu activity is trending upward.
