U.S. Flu Cases Hit 25-Year High

A severe flu season is surging across the United States, pushing doctor visits for the illness to their highest level in 25 years. The Centers for Disease Control and Prevention (CDC) estimates there have been at least 11 million flu cases so far this season. The agency's latest data, current through December 27, shows a sharp national increase. The CDC's surveillance measures the proportion of patient visits for flu-like symptoms. This key indicator has now reached its highest point since the 1997-1998 flu season. Health officials urge the public to get a flu vaccine. They say it is still the best defense against severe illness. Other preventive steps include frequent hand washing and staying home when sick. The early and intense season is straining some hospital systems. Experts continue to monitor the spread.