Currently, flu activity is categorized as “very high” in 29 states, and “high” in 15. States in the South are ablaze with flu. Louisiana, Tennessee, and South Carolina are at the highest “very high” level. But parts of the Northeast corridor are also seeing extremely high activity, including Massachusetts, New Hampshire, New Jersey, and New York City.

As often is the case in flu seasons, the age group hardest hit this year are children ages 0 to 4. The CDC recorded 16 pediatric deaths linked to flu in week 4 of the season, bringing the season’s total pediatric deaths to 47.

Overall hospitalizations are up. The Centers for Disease Control and Prevention estimates that there have been at least 20 million illnesses, 250,000 hospitalizations, and 11,000 deaths from flu so far this season. About 44 percent of US adults have gotten their flu shot, far below the public health goal of 70 percent.

Laboratory surveillance of influenza cases in week 4 indicates that nearly all of the cases are from influenza A viruses, about an even split between H1N1 and H3N2, which has been the case over the course of the season. Around 2 percent of cases were the influenza B Victoria lineage.

https://arstechnica.com/health/2025/02/sick-right-now-flu-is-resurging-to-yet-a-higher-peak-this-season/