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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Neuraminidase inhibitors, the antiviral drugs given to fight and prevent influenza, pose no safety risks to fetuses or newborns, according to a new study published today in BMJ. This is the largest study on antiviral use and safety in pregnancy conducted to date.
Also, UK scientists yesterday reported a novel subclade of the H3N2 strain of influenza.
Flu activity remains elevated throughout much of the world, with the H3N2 variant dominating, according to a new update from the World Health Organization (WHO). The report said the peak of flu activity may be over in parts of Europe and North America, with some countries reporting a slight downward trend.
The H3N2 strain continues to dominate, especially affecting the elderly.
Flu markers rose to their highest points yet, as influenza B detections rose slightly, typical for the later months of the flu season.
Clinic visits and hospitalizations for flu rose again last week, with the disease now widespread in 40 states and Puerto Rico.
For the first time this season, the marker for pneumonia and flu deaths rose above the seasonal and epidemic thresholds.
With novel H7N9 avian influenza cases in China this month already topping an early, steep surge seen in December, two provinces reported four more cases, according to official sources, as US officials posted a travel alert because of the spike in infections.
Flu markers rose again last week, with disease activity now widespread in 29 states.
The US reports widespread flu and 3 pediatric deaths, while Europe is being hit hard.
