With increasing time since diagnosis, only the severe infections continued to cause symptoms.
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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Republican and Democratic lawmakers who head a House oversight and investigations subcommittee yesterday sent letters to five federal health officials asking how lessons learned from this flu season—with its flu vaccine mismatched to the main circulating strain—could be used to improve the nation's flu preparedness in time for the next season.
Flu activity in the United States was elevated last week for the fifteenth week in a row, but surveillance markers show that levels continue to decline.
The Centers for Disease Control and Prevention (CDC) said today that the percentage of doctor visits for flulike illness dropped from 3% to 2.5% last week, but it is still above the national baseline of 2%.
Using a new method to estimate influenza-related hospitalizations and deaths, the Centers for Disease Control and Prevention (CDC) calculates that somewhere between 5,000 and 27,000 Americans died of flu-related causes during each of the three flu seasons from 2010-11 through 2012-13.
The latest estimate of the overall effectiveness of this year's seasonal influenza vaccine puts it at just 19% (95% confidence interval [CI], 7%-29%), slightly lower than the 23% reported in mid-January, the Centers for Disease Control and Prevention (CDC) reported yesterday.
Nearly all measures of seasonal flu circulation in the United States continued their slow decline last week, but they stayed above baseline levels, making the season officially longer than average, the Centers for Disease Control and Prevention (CDC) said today.
Thirteen weeks has been the average span of flu seasons over the past 13 years, and last week marked this season's 14th week, the CDC noted.
The WHO notes signs that flu strains, especially avian ones, are co-circulating at unprecedented levels.
Two of China's provinces—Anhui and Guangdong—reported a total of three new H7N9 avian influenza cases today, according to separate health department reports.
The hospitalization rate in the elderly sets another record, and the CDC reports 6 new flu-related deaths in kids.
An additional case of H7N9 avian flu in China's Guangdong province has been reported to Hong Kong's Centre for Health Protection (CHP), according to a machine-translated statement posted today by FluTrackers, an infectious disease news message board.
Flu activity remains high and will likely hang on for several more weeks, the CDC says.