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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Flu activity in the United States continued a slow but steady rise last week, with slight increases seen in several of the markers that the Centers for Disease Control and Prevention (CDC) uses to track the levels.
US flu activity increased slightly, with similar rises in other Northern Hemisphere nations.
Kansas researchers have developed a vaccine that they say can protect poultry against multiple H5 avian flu strains, but chicken producers remain reluctant to use such vaccines because of possible foreign bans on US poultry products, according to reports yesterday.
Canada can now be added to the growing list of countries that have detected MCR-1, the recently identified worrisome gene that disables the last-line antibiotic colistin, after it was detected in a patient and in ground beef sold in 2010, the Toronto Star reported today.
After being identified for the first time in China in November, the gene has now been confirmed in samples from at least 11 countries.
Chinese health officials have confirmed the second case of H5N6 avian flu in a week, the World Health Organization (WHO) said today, while also reporting a new case of H7N9 avian flu. The H5N6 infection is the world's sixth.
Health officials in China's Jiangxi province today announced an H7N9 avian influenza infection in a 46-year-old man from the city of Ganzhou, according to a provincial health department statement translated and posted by FluTrackers, an infectious disease news message board.
The case is the eighth in China's fourth wave of illnesses and Jiangxi's first case since May.
Nearly 200 new suspected cases of microcephaly potentially related to the spread of Zika virus were reported in Brazil over the past week, raising the total of suspected cases to 2,975, according to a translated bulletin from Brazil's Ministry of Health (MOH) posted yesterday by infectious disease blog Avian Flu Diary.
The percentage of clinic visits for flu rose to 2.2%, above the national baseline of 2.1%.
Though overall flu activity in the United States is still low, the US Centers for Disease Control and Prevention (CDC) today reported some new developments, including the 2009 H1N1 virus nudging ahead as the predominant strain for the week and the recent detection of a variant H1N1 (H1N1v) case in Minnesota.
China recently reported four H9N2 avian influenza detections, all in children. The cases were noted yesterday in a report in Chinese from Taiwan's health ministry that was translated and posted by FluTrackers, an infectious disease news message board.
