Flu activity rose again last week, nearly reaching the seasonal baseline, with all three strains circulating and subtypes varying by region and age, the US Centers for Disease Control and Prevention (CDC) said in its weekly update today.

Nationally, one of the main markers—the percentage of clinic visits for flulike illness—rose to 2.3%, putting it just below the 2.4% baseline. However, four of the country’s regions are above their specific baselines, and more states are reporting high and widespread flu activity.

Credit: iStock, grinvalds

Woman with sick baby calling doctor. Worried mom looking at thermometer showing high temperature of her little child and calling doctor for advice.

Hot spots mainly in southern states

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