Flu activity surged in the United States during the final week of January with healthcare visits for respiratory virus symptoms reaching a notably high level, according to the Centers for Disease Control and Prevention (CDC). Flu test positivity rose to 31.6%, and outpatient visits for flu-like illness climbed to 7.8%, staying above the national baseline for the 10th consecutive week. Flu activity remains high or very high across most of the country. The CDC estimates …
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