US respiratory virus levels remain high as flu rises in central states Respiratory illness levels in the United States remained high but stable last week, with flu activity rising in some regions of the country and indicators declining for both COVID-19 and respiratory syncytial virus (RSV), the Centers for Disease Control and Prevention (CDC) said today in its latest data updates. CIDRAP

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Test positivity for flu declined nationally but is increasing in the Central region, an area that includes Iowa, Kansas, Missouri, and Nebraska, the CDC said in its weekly respiratory virus snapshot.

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