New CDC data indicates a significant rise in flu cases across the U.S., with at least 7.5 million cases, 81,000 hospitalizations, and 3,100 deaths reported as of December 20. Notably, New York experienced a record 71,000 cases in one week, and Massachusetts reported high activity levels, especially among children. The rapid spread of the H3N2 influenza A subtype is raising concerns, particularly for vulnerable populations, while vaccination rates have been lower this year. Experts emphasize the importance of flu shots in reducing severe illness risk.
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