Flu cases are climbing across the United States as the season reaches its peak, and millions of people may get sick in the weeks ahead.
If you catch the flu early, antiviral medications can help shorten how long symptoms last and reduce the risk of serious complications.
Influenza, commonly known as the flu, is entering its seasonal peak as the new year begins. Flu activity across the U.S. increased by about 15% in the final days of 2025, according to the U.S. Centers for Disease Control and Prevention.
If you think it's too late to protect yourself this season, it may not be. Flu season often unfolds in two phases, driven by different virus types.
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