Patients infected with A(H1N1)pdm09 were 42% more likely to be admitted to an ICU, 79% more likely to need mechanical ventilation or ECMO, and 25% more likely to die.
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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Investigators are working to determine the Chilean man's H5N1 exposure, and in Senegal, H5N1 has now infected a poultry flock.
Nearly two-thirds of patients hospitalized with flu, RSV, or COVID-19 received antibiotics, but they had a higher risk of death than those who didn't.
The new analysis includes death records and out-of-hospital heart attacks, finding a more robust connection than an earlier study.
Recently approved for emergency use, the first combo at-home test for COVID-19 also marks the first self-test for flu.
China is experiencing a surge in H1N1 activity, India is battling H3N2, and flu is still above baseline in the European region.
Officials are investigating a cluster of severe influenza B infections in kids and teens, some of whom had complications.
After peaking in late 2022, global flu activity continues to decline, with greater proportion of the H1N1 and influenza B viruses detected.
The company, however, recently filed for bankruptcy, citing the prolonged FDA authorization process.
The Department of Energy, with "low confidence," says SARS-CoV-2 may have come from a lab, and a controversial doctors groups touts ivermectin for the flu and RSV.
US influenza activity is still low, flu vaccine protection is moderate, and WHO advisers only tweak the makeup of next year's flu vaccine.