Over the holidays, U.S. flu cases skyrocketed. Weekly hospitalizations from the virus went from under 7,000 at the start of December to over 33,000 by the last week of 2025, surpassing rates of the ...

Serious infections with influenza A viruses are characterized by an excessive immune response, known as cytokine storm. It was previously unclear why some virus strains trigger these storms, while ...

Late in the Middle Ages, Italian stargazers gave a name to the annual contagion that rolled around each year like clockwork. It was a name that stuck, and to this day is known as influenza. Medieval ...

The 2025-2026 flu season is surging in the U.S. and New Jersey, where there's been increased severity of influenza A, with further testing from the CDC showing many NJ residents have the emerging ...

A new mutated strain of the common flu, influenza H3N2, subclade K, is spreading across the Northern Hemisphere, including the United States. This particular strain has gained dominance in many ...

Scientists have captured a never-before-seen, high-resolution look at influenza’s stealthy invasion of human cells, revealing that the cells aren’t just helpless victims. Using a groundbreaking ...

The number of people getting sick with influenza B has gone up for three weeks straight, now making up about a third of flu cases nationwide.