Flu season worsens as 44 states report high activity

The measure of traffic in doctor's offices is based on reports of symptoms like coughs and sore throats, not on lab-confirmed diagnoses. So it may include other respiratory illnesses.

That makes it hard to compare to flu seasons from before the COVID-19 pandemic. Other years also didn't have this year's unusually strong wave of RSV, or respiratory syncytial virus, a common cause of cold-like symptoms that can be serious for infants and the elderly.

Meanwhile, 44 states reported high or very high flu activity last week, the Centers for Disease Control and Prevention said Friday.

That may not bode well for the near future. It's likely there was more spread of respiratory viruses during Thanksgiving gatherings and at crowded airports, experts say.

The dominant flu strain so far is the kind typically associated with higher rates of hospitalizations and deaths, particularly in people 65 and older.

The CDC estimates there have been at least 78,000 hospitalizations and 4,500 deaths from flu so far this season. The deaths include at least 14 children.

Flu shots are recommended for nearly all Americans who are at least 6 months old or older.

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