More than 50 counties in Arkansas have logged at least one case of whooping cough.
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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For flu, the sensitivity of the definition was 76% and specificity was 31%; for RSV, those numbers were 71% and 39%, respectively.
The CDC also provided data on the rise of subclade K among H3N2 flu viruses ahead of holiday gatherings.
The new Public Health Alerts initiative is designed to deliver information and early warnings about emerging health threats, enabling swift, informed responses across the US and globally.
In addition, the emergence of the influenza A H3N2 subclade K virus fueled a record number of flu cases in Australia this year and extended the season, which may have implications for the Northern Hemisphere season.
The antiviral medication significantly reduced hospitalizations among females and patients under 50.
Both the CDC and WHO say preliminary UK data show the current flu vaccine offers strong protection against subclade K.
Researchers identify nearly 5 excess cardiovascular events per 100 patients in the year after diagnosis.
Current US hot spots are Utah, Arizona, and South Carolina.
The CDC has closed its investigation into a Salmonella outbreak linked to eggs that sickened 105 people in 14 states.
In a phase 3 trial, participants who received the shot were 29% less likely to be diagnosed with flu than those who received a conventional flu shot.
