The proportion of outpatient visits for flu-like illnesses rose to 2.2 percent nationwide, a tenth of a percentage point above the national baseline. Additionally, six of 10 U.S. regions reported instances of flu-related illness at or above their respective baselines. However, the proportion of deaths attributed to flu still remains below the system-specific thresholds of the 122 Cities Mortality Reporting System and the NationalCenter for Health Statistics Mortality Surveillance System.
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