Amid a surge in U.S. flu cases over the holiday season, health officials warn of a severe flu season that may worsen. New data reveals that this season's flu activity is already surpassing last winter's harsh flu epidemic, with 45 states reporting high or very high flu activity during the week of Christmas, up from 30 the week prior. Public health experts attribute the higher numbers to the dominant spread of the A H3N2 flu virus, which has historically caused the most hospitalizations and deaths in older people. This season, the H3N2 infections analyzed are predominantly a new subclade K variant, differing from the strain in this year's flu shots, raising concerns about the potential mismatch. Flu seasons often peak in January or February, making it too early to assess the impact of this mismatch. This follows a challenging flu season last year, with the highest hospitalization rate since the H1N1 flu pandemic 15 years ago and 288 child flu deaths, the worst recorded for a regular U.S. flu season. This season, nine pediatric flu deaths have been reported, surpassing the highest mark from the 2024-2025 season. Dr. Robert Hopkins warns that the H3N2 virus typically affects older adults more severely, and rising rates among children and young adults indicate a severe flu season across all age groups. Additionally, the percentage of doctor's office and medical clinic visits due to flu-like illness was higher late last month than during the previous flu season. The U.S. Centers for Disease Control and Prevention estimates at least 11 million illnesses, 120,000 hospitalizations, and 5,000 flu-related deaths this season. However, a controversial move by the Trump administration has halted flu shot recommendations for U.S. children, shifting the decision to parents and doctors. Despite this, flu vaccines will remain fully covered by private insurers and federal programs. The U.S. government's decision to stop collecting Medicaid data on immunization rates has sparked concern, as it eliminates a valuable source of data for assessing vaccine-preventable diseases in children. Health Secretary Robert F. Kennedy Jr., a former anti-vaccine advocate, criticized this move, emphasizing the importance of respecting patient choice and not coercing doctors or families into vaccine acceptance. However, Dr. Hopkins warns that this decision will significantly impact the ability to monitor and protect children from vaccine-preventable diseases.
